Popular Mechanics 1925: Vol 44 Index

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Popular Mechanics Magazine INDEX TO VOL. XLIV Edited by H. H. WINDSOR, Jr. July to December, Inclusive Popular Mechanics Company CHICAGO

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Accidents GE RNS (SNE 5s on. oe kes deka wenn 564 nails most dangerous implements in industry. 776 7 testing slippery Moors. .....cccceccscscesces 51 Acetylene—printing with acetylene light......... 491 Advertising balloons, electrically lighted re ee 272 light Eiffel Tower as “ad” for auto factory. 602 moving sign on highway Secndehin en ahearenee . 841 SOR) WUPGTER BR GOUMEMET, «oo sccccccsvcscces 928 show windows on sidewalk during remodel- Eee eR ep rene tor en 181 Aerial Postal Service on the blazing trail of the air mail.......... 62 planes gather mail in flight................ 248 Aerial Warfare army anti-aircraft guns eee eee 986 finder for anti-aircraft guns..............+. 792 nets launched on rockets to snare airplanes.. 182 _ 2 See sea aerate 907 Aeronautics——propeller for boat or plane also acts EEE. Debate (ouReeee le eesneesunt 88 Africa rivers sought to fill dried lakes by means of SOUND «5.06 2 54069 tens anes epcehesnee 954 tribes in mourning, paint bodies white...... 217 with pygmy cannibals in the Congo........ 595 Agriculture gas = kill crawfish and save millions of MN. sriwrelralcd cule deat a hewe kame eid be 17 homemade wheat dusting machine.......... 515 EE CINE: ne-a n't tb Gain & abe os Badawi 346 triple farm labor capacity with machines..... 625 Air—skin treated with liquid air to cure it...... 470 Airplanes “heer ere 786 auto an starter for SlOMOS. «cc cvcccscvevece 625 auto of the clouds also able to travel on MEE in Ginuatiwstkins Che cei cae erne ohne 180 boy nearly upsets plane stealing ride....... 822 engine value drops ten dollars an hour...... 921 flying risks cut by slots in wings of plane.. 13 for Arctic flights impractical................ 761 French air liners to have four motors...... 465 ow, es ef. reer 46 moth plane auto of the air.................. 271 motor pushed across desert to save airplane. 93 rotor propellers for plane.............see0. 2 safety vane on plane wing................. 912 ten ton plane for long sea trips............ 555 wings of metal airplane support sixty-one DO able d4a wens Sabnreeawennceseaanes 189 wings strong enough to walk on............ 959 wooden frames soak up 100 pounds of water on damp day Airships army dirigible to act as carrier for planes... 31

gg OS a Eee eae 216 cost of landing airship “Los Angeles’’...... 385 hitching post for dirigible is padded........ 768 to blaze route over top of world............ 927 NE RNIN I os Sa ela Dire ccs ai w dca aun ate Wid 2 what happened to the Shenandoah?.......... 711 Alaska conquering Mount Logan.................. 899 milk frozen into blocks for delivery in Alaska. 384 pro@uces most tin in U. S.....cacsceccsees 461 Alcohol from prickly pear for motor fuel.......... 411 German alcohol can’t replace gasoline...... 799 Allen, J. C.—Kinks for the farmer : aa Aluminum en ne NE NO no a wid a a wre Wk 814 great world map on aluminum.............. 553 honey output doubled with aluminum combs. 208 Oe a ee eee S 202 ND rata Sg N bh w doa 0.0 k: 6 wes soso 696 eee 338 Amundsen, Roald—vessel sailed by Amundsen ex- sg | EE SSE ee 181 Amusement Parks building a scenic coaster.................. 140 eer Se GUE GOMUOOT . icc iccccciccsucs 720 Animals big game increase in National forests........ 473 cats and dogs tended in free hospital.... 281 elephant’s cold cured by inhaling vinegar.... 792 England to honor animals killed in war...... 360 farms leased in Ohio as game preserves...... 108 few left. that defy skill of traimers........ 54 gas masks for army animals................ 647 sions battle and tear up films display........ 406 ‘medicine given dog by tying jaws.......... 190 , rare birds, beasts and fish found off Mexico.. 288 POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 Anthropology—trail of prehistoric man found near eee TAME HUI. occ ccc gwscvceviatere 539 Ants—poison gas routs them.................. 968 Archaeology—mound builders and Maya connec- 8 eee 987 Archery bow and arrow used for fishing in South PEE, aster ciniawdcunn ak den an ee 369 cg, OO ee ee Ee Peer ree eee ee 9 Architecture home of value and distinction............. 527 new type of roof and wall.................. 392 skyscraper built in terraces at St. Louis.... 448 Arctic Regions airplanes impractical iM......ccccccsececs 761 bluegrass and winged snails found in...... 816 Sees CO TE WO os neh hh s wcccacesaces 927 lone adventurer faces dangers of............ 790) midnight sun photographed................ 707 Snow's (H. A.) expedition in the “Herman” RD cccccccecconsecsecesesesesssesseces 367 three nations in air race to polar lands....... 7 “Arcturus” (Ship)—hunting tigers of the sea. 547 Argentina—yields giant bones of whales high Gets Ws dink Keene cigkeeosenus 94) Armor—armored gunners to fight future sky SO Nivcsarsnveadd beni et opataeer wee 960 Art gallery modeled in sand...............40.. 637 revolving stage for art students............. 330) Artesian Wells—run turbines.................. 447 Ashes—using garden hose on ashes............. 840 Asphalt—removing, from concrete............. 870 Astronomy—yearly fall of star dust........... 11 Athletics cyclist uses men as hurdles................ 288 motorcycle stunts by police thrill crowds.... 750 walking race on treadmills.................. 625 Atkinson, R. L.—Doing the impossible...... 79 Atmosphere—tester tells air humidity and rate of Pb Ccdwnnce sane Crea wbiense eens 241 Automobile airplanes able to travel as autos.......... 180 5 eee. Gt WI ncn eenacace senses 625 autos and roads worth as much as railways... 47 belt and snowshoes for auto.............. 752 Diesel motor as auto power forecast....... 289 ee Sn I cnt oc cee mdencnes wish nad 682 for every horse in United States............ 89 Ce ee re ere ee 1036 motor industry furnishes railways 2,000,000 carload shipments | ere ee 28 rer rere Pre er 1028 radio set for motorists fits instrument board.. 14 refined by research to stop wear and noise. 109 using old touring car for delivery.......... 1039 SB eee eee 328 Automobile Design—limousine taxicab protects i Pi Cec age cs treekoeesaween® 894 Automobile Driving - : experts advise warming engine as soon as MOE ocnsvddanantateedceseesnee swe 679 higher speeds on good roads urged.......... 574 Se res rer eT 844 women motor drivers equal men in skill.... 554 Automobile Parking space in basement of bank................. 889 underground park for autos.............-++- 279 Automobile Touring free shade for motorists. ............ccceces 541 ES SR WN Sve civecescaesccaseeeses 228 single seater pygmy auto crosses. continent. 944 WERE ie BONRs oo c cs cccvcceccceses 329 Automobiles—Equipment and Supotics adjustable bed for open or closed cars....... 74 auto camp outfit combines four articles in EV re Preyer Teer rere rT Ter 628 oe ee er re 864 auto seat with folding back converts car into Ml c6 Ge veeabad Aheraesd tasketeaneens 274 mae gent Goel RONG. 66 ic <0 tscd cdc tsiensews 508 balloon tire car steers with two wheels 898 car seat made into table by frame supports... 58¢ clock on radiator visible in dark.......... 54 compartment behind dashboard useful to _ Ro Wace pene nee here earteneesenes 51 cover on auto tire padlock prevents rust and NG . én inkeatiden jean tet deena ewe 93 door silencer protects closed car windows.... 572 fan shaped glare protector fits windshield. 561 flat sheets of iron inside of hood keep CN CRUE ne ince cdedecenes seedenae 1042 folding table fits auto door...............- 61 handy water container of inner tire tube.... 850 holder for auto light bulbs folds out of way. 112 auto bed home comforts in ea Og Se Aut Au Au

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POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 3 Ww) @ ‘ace ee and Supplies: ued) Aviation — — ceremming,oae iss winded 307," ier of the fate aia jieg oss 88 eo oe spring leaves reduce bumps.. 64 army dirigible to act as carrier for planes.. 31 pane hat rack made from springs........-. 158 automatic fire extinguisher for flyers........ 106 nn ing cap on gasoline tank..........++++++ 256 aviators seek riddle of how birds fly........ 766 =e ~ post registry card.............--+- . 636 battle cruiser converted into airplane carrier 967 suspension bed inside auto folds up in ap 16 beacons that guide flyers across nation..... 63 tire tool for split rims of great leverage.... 789 =, a — " _—— aviators * towline with spring..........eeeeeeeerees . 959 ear” detects hum of plane ten miles away.. two way ventilator........... baiGkedamme-s ee 776 fighting insects by means of gas..... seeee ++ 567 watch case on auto dash...........-0eeeees 617 floating isles to facilitate transatlantic avia- te i r tes auto DN nahdS sek dkhed bose Oke ceegeneeenen ae ee ete éeceveese 727 giant searchlights visible over two hundred _— Fuel. SD SE Rass it eeeCeddeedesc ve . 573 u gus tok ew aap panel ty ter en die... 5 SE ae Ge feeb nc Be gas tank filer on dash o-oo azres cee: 799 nets launched on rockets to snare airplanes.. 182 ee . ome for a era 624 on the blazing trail of the air mail........ 62 me OS ee eee 676 photos of air eddies studied to improve air- making gravity feed efficient. .......-.....+. 9 PE ct cthenusabkhpsbesatennies came 990 — “y —er ae - cgmyeteeeinig | plane modeled after flea to cross ocean...... 976 ee ee eee 844 progress in radio and flying shown by army saving the on Serato ee a pe ME: xaxesdesiahidivitesdsssenedurcne 201 Automobiles—Igni 331 rivers sought by airplane to fill dried up lakes 954 cleaning spark i plugs he aah hid kote ak hs EES Gat oo cennks Gewaneuan bieineetie 33 flash ——s spark plug shows missing 976 special maps for aviators............+eee0 242 cylinder -.+++-seececeeceeeenesssseres 976 8 eo oe anos air line. 37 rapid spark plug cleaner burns off carbon.. 399 Sas dae ae es nls” hep ae 9 testing Ford cotls......cccsccccccccccccees 174 Rs ee - Automobiles—Lig ghting watching the weather from above............ 243 booth for headlight tests aids auto safety..-. 399 awnings—crisscross canvass admit more light.... 978 box for extra auto bulbs...... ge cceccceeees 816 ° carry spare bul — motoring.......... 1 OS B gauges focus auto lights.............+s+++ B Carri headlight dimmer on wheel................ 3 aby Carriages ‘ improved wiring Da gi hee OD cipaee ded 333 —we walker combined............ = improving ground for “tulite” bulbs........ rer rrr venouiile MS > eee a a shear and bag on pole............ 202 eet oe a Se Mere asesetoncceseus 940 bumping the clouds in a racing balloon...... 210 a +4 ht chock SRM. cccunec-oceoe Mh electric lighted for display.................. 272 a i ee nS er eenee ewes 977. ~+2Baltimore, Md—rubber tired tractors pull city two filament light bulb..............-0000- freight MMS. oe eee. ene 281 Automobiles—-Lubrication 288 jBamboo—American grown............sceeeeees 765 booster” on auto grease gun........6-056. 74 Banks and Banking crankcase oil drain on dash................ T armored ton setters” RS iris 6 biked acetate 574 ery ER 358 tear gas released by cashier................ 241 dash light and oil gauge in one............- Bar, lifts itself on legs to escape high waves.. 431 greasing universal joint..........-e+seeeeens ed —pressed bark for fuel : : 161 oil timer tae eee sewers eereeseeesssesnae Basket Ball—scoreboard made by ‘echo! chess. é : 500 Automobiles—Radiator—thermostat for auto mo- -. Baskets—art and utility combined in handicraft.. 592 22? COP ccc ceccsecsecsensocscccccesorocese Bates, Will H. 28 Automobiles—Repairi Inexpensive crystal receiver........... oo: O 14 auto ps Be COs 0c kc ccwrssvescces 970 Making loud speaker from headset 295 109 eliminating the rod rattle.......... Keevebes 519 Bathroom Fixtures— interchangeable Sais irae to 139 freeing frozen bearings..........scsceccees 1042 I oe, ci ccuuacdeena 812 328 gasket for old style mufiler head........+... 1028 Baths—supporting baby’s bathtub.............. 313 installing oval gasoline tank on old model Bats—enemies of insects, friends of mankind. 785 394 WOO * nenstesnssan ce cenesbaesnabvnee ws 1054 Bay of Fundy—tides to generate super-power. 959 a LU eee eee 870 Beans—carpets from string Sr ee iS 727 outside oil line on Ford motor makes quick Bearings—money saved by ball bearings........ 1049 579 TEPAIT ccc sere cece ce eccccccceescceees 702 Beauty—gauge tells what to eat..............5. 253 74 CMCNEE BUND SOM, cio si esercsdsscebeaeete 150 Beds 844 piston knock detector. ......-+++++e+eeeees 1040 comfortable outdoor sleeping tent.......... 1015 54 re-covering auto floorboards............-.+. 1018 hammocks from benches for school kinder- remedying worn Ford hubs.............++. 684 SNE 5 ska 35 ch oceawcdvaabheeccaes 2 189 removing Ford front spring perches... .. 878 Bees 79 repairing auto curtain fasteners....... reese 156 honey output dovttet b ty aluminum combs... 208 replacing Ford transmission cover......... oo S18 mice Pane ns a ON AO SARS PT aS 285 4) restoring brake bands............-+seeeeees 861 solve mystery of eeu of honey bees.... 181 28 retaining split hub cap.......-+-.+eeeeeees 313 CE NE sce dewesccdvecruveverccénen 842 44 vacuum cup for auto valves.......++++++++ 783 Bells—church bell cast from coins.............- 939 29 winter car ailments avoided................ = ge tk. ea rr ree 173 your car—repair it as you §0.............. puta. 6 raised walks in busy square.... 289 43 i 3-9 key in double 365 sf with curved sides for pickers beubar 201 ock on ignition and gears............ | outh American tea for U. S......... 249 28 Automobiles—Safety Devices and Measures Bicycles—combined scooter and bicycle for side- 64 auto horn code signals.......--++++s+++se+. 564 ME Scncbasnevestsdddieethccedeseaes 554 auto si winks its warning............. 766 = Binoculars—rented on beach in California........ 433 74 automatic cranker on motor to prevent stall- Bi 08 ing COTO cee oeseerecesseesereceosesecos 100 nt of carbon con ed b m xt ox booth “for “headlight tests’ aids ‘safety’ 2111. 99 smoyears old... +... acca ae 86 fan shaped glare protector fits windshield. 561 weight lost in sleep shown by scale......... 532 4 foot switch for car signals.................. 248 world’s most wonderful power plant...... 635 glare screen fastens on windshield........ 99 X-rays show how food converted into 51 headlight dimmer on wheel.............. 3 SPE feso One Nerawadis dus casa ace 249 roadway raised as barrier to guard crossing.. 215 Birds 93 Autom: tarting anker on mo- as weather prophets................-ccceeee 600 72 tor to prevent stalling................. attractive ‘wren house.................s00. 507 61 Automobiles—Tires—spare tire rack with spring big bills from Mother Nature.............. 4 saves lifting on and off................ cure for woodpecker holes not found........ 593 4? Automobiles—Wheels eges gathered by thousands in rowboats.... 789 61 adjusting i lll ee Eee 332 elephants help hunt rare duck in India.. 48 50 collapsible 2 een 892 farms leased in Ohio as game Preserves..... 108 1? removing rusted auto wheel................ 492 feeding and housing birds help destroy insects 777 09 rubber disks on auto wheels............ ° 914 few high flyers airplane pilots find.......... 98

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POPULAR MECHANICS

INDEX, VOLUME XLIV, 1925

Birds: (Continued) Brittin, F. L.: (Continued) ouses that grow from gourd seeds........ 15 Nine tube Supe@het.....scescseccccecesees 477 hunting bird’s nests for soup.............4. 255 a are er ee 829 plague of caterpillars laid to bird feeding.. 707 Simple alternating current tube receiver...... 1005 ee eer rete 766 Brooms—in which fillers can be renewed........ 812 ME (SOR ccc nckcadas eenetadass 201 Bruno, H. A.-—Airplanes aid explorers in Brazil... 786 spoil radio reception with .nest in fuse box.. 449 Brushes world’s bird population............++0+++45 630 CRORE DUE DEGTNRE 66.0 6c ccccccnencannn 143 Birth Rate—increase declining in U. S.......... 16 electrically heated for drying hair........... 989 Bison—movies pay owners to rais€............ 384 iL. Ue SS ene 286 Black Hills, S. Dak.—‘‘ice mine’’ in st pas 810 IE DEE 5.5 ck ake WG awa ee a Aokae a a 348 Block and Tackle—safeguarding...........+++ .. 866 homemade wire brush cleans stovepipe...... 1019 Blocks—chopping block on springs.............. 215 NE RE Dc ctand an deen ctsennn ences 639 Blue Prints Buckets—handy tire water bucket.............. 850 making blue prints on heavy paper.......... 346 Building—rain proof sleeping porch............ 156 revolving blue print stand................ 337 Building Materials Boats and Boating keeping mortar warm in winter........... 1040 boys taught to build boats as part of school using tin cans in concrete walls............ 853 DE, eticdd ScuWe eked as tseeebaae wd ne ee 180 Built-In Furniture for the Home folding canvas boat closed by snapper...... 369 Pest Vali GHOSE. 2 ccc ccccccvesnees 153 how to make your boat watertight.......... 487 Part IX—building mantel shelves.......... 326 light metal boat folds up on running board of Part X—hbookcases .....-scsscscvccceccees 521 Se Adalstrirein shied wiibe atalae wae-ae nea 77 Part XI—built-in writing desk............. 697 making boat bailing pump.................. 324 we ee ere ee 875 ee a ere 24 Part X111—indirect lighting fixtures........ 1050 ciedidcunews ces baexues aamens 767 Bullet-Proof—metal tc foil bandits.............. 952 preventing lost of outboard motor.......... 507 Bulmer, A. W.—Protecting the dividing head.... 162 propeller for boat or plane also acts as rud- Bundesen, Herman N. Shs 0 atin ar Neral dias ob Gan ee Sewer ae Wd 88 How to save gas, shock and drowning victims 762 rotor yacht races sailboats...........ssccee 407 fs Sk. 8 8 errr 894 sower eteers by Mirror... .....ccccccsccce 370 Burglar Alarms SOU TACK CR WOHIBKIP. 2.6 cic ccccsccscas 72 picycle bell burglar alarm...........cccseee 346 sailboat with two hulls keeps better bal- window lock and bell combined............ 638 BE a date aielein wae Waa alate eis eras 40 Burke, F. D.—Building a radio mast.......... 649 strange craft that ply world’s waters...... 226 Burs—cocklebur guards ..,........sscececseees 313 treatment of boat lumber................. 338 Burwash, Maj. ‘‘Lockie’’—lone adventurer faces Boilers CE Rec er ree 790 burning oil in water eliminates flue losses. . 6 Bushings—taking up play in brass.............. 686 motor for cheating Buwes. i... cccsccccccscce 416 Butcher Supplies—motor drives butcher's slicing Bolts—inserting in awkward place.............. 696 REE Sete ecvinecedndvk edeceese ean 1049 Book—with seven-foot pages turned by electricity. 442 Butter Book Cases OS TE EE Se ee ee eee 542 emee-tm feirnituwe Mart Secs cccccccccaccsnces 521 Prince of Wales modeled in butter.......... 369 combined drawing table and.............. 865 Butterflies Boots and Shoes farm hatches cocoons by ‘electricity.......... 822 aluminum soles on golf shoes.............. 814 sGemtined by OOF... ..cccccccccsccesncese 985 Clips to keep rubbers Om. .......6cccsccces 628 BE evenccencesthpbewericss bures coves 329 detachable shoe heel plate for climbers.... 473 mystery in their trek.........-.sseseeeee 743 high heels for men’s shoes................ 939 Buzzers—high tone easily made............... 492 eS er reer 141 laces of ots, eotanuan POTEET eee 74 C prebectot Ih Alte GHWINE. css. ccccccsccices 988 Cabinets : NS a oo Sia ate aiding via dee a a we do vbigae 111 for kitchen, handy to sink........cccccecss 988 rubber heels easily slipped in............... 813 Ee ee ee ee erie 158 shoe buttoner in combination tool.......... 989 made by President Coolidge................ 554 shoes half soled OE OU. 6c ciesccccccceses 752 well designed radio cabinet................ 1001 shoes to fit steel girders aid iron workers.... 264 Cables smcecieimacvage Mbenodll eae ot eee ee ee 67 St MO i os anesienaweenn we 947 Borax—rare in early times..................0% 893 fom@est PROME CHBIC. 0.6 cccceccccscs oat areas 816 Boring Machinery—turning and boring eccentrics. 514 California Botany _ e necklace of lights for Lake Merritt........ 912 cannibal plant eats itself.................. 806 statue of Samuel McCarthy of gold rush fame 896 first aid to frozen plants. .... Sede se weteeeows 1029 three span Van Duzen river bridge seven hun- plants work overtime under light............ 532 Oe Be WR osc aicnes ppbantacentxe 60 ON a Sere 465 triple crossing at San Diego for safety.... 585 rs MN yd bake aed phe Oe 0b vide oad ee 207 Cameras Bottle Openers handle for small, serves as tripod.......... 100 ee OO MN Dek ae sc euvenaonws vans 209 movie camera cranked by motor in bag.. 630 rubber lined cork also serves as opener...... 607 serves as sextant to direct aviators........ 40 Boxes Camping five years old as packing case............... 629 = bed in open or closed car...... 743 how to make inlaid glove box.............. 670 auto camping trunk holds bed and table. 38 ee UO” =e eee 675 auto outfit combines four articles in one. 628 Brackets—steel brackets for scaffolds............ 39 car seats made into tables by frame supports 586 Brakes—electric brakes on busses conquer steep folding grill for outdoor fits “‘canned heat” errr err reese 458 SOE... 605 cians paeot ha tenure eed obese 415 Brass—taking up play in brass bushings........ 686 folding table fits auto door..... TUTTT TT tee 61 Brazil—airplanes aid explorers in............... 786 screened camp shelter... ..ccccccccecscececs 315 ” * area 883 EP Sr Ar iv Poe 0 Candy—“‘all-day-sucker” sticks a new industry... 744 toll bridge to cross Florida bay............ 630 Capron, Arthman N.—Building a _ two-kilowatt Brittin, F. L. UP CORN. «5 ,cns besp0saccdtanse® - 867 Getting the most out of the radio set in the Caps—fiber helmet under cap for jockeys........ 898 SUMMEF SEASON cecsersrercescvcveseres Caps (metal)—spring cap on gasoline tank...... 256 6 POPULAR MECHANICS INDEX, VOLUME XLIV, 1925

Carb Cart Carl Car! Carl Car’ ROaO

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162 762 894 346 638 H49 313 790 586 49 542 369 522 16 12 96 ~_ -_ ~~ ee Dw maeerns ~~

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POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 5 Carbide—to keep indefinitely........ keel ae ee Carbon—amount of carbon consumed by man sixty years old... = ; , Carbon Dioxide—in steel bottles for tire filling. . . 1000 Carburetors—mixture for starting autos in sum- OT s0ccssses esac eee ccesecseececccees 1017 Carlson, Milton—finger prints lie science answers 353 arpent ’ ier peudion woodworkers. ......ccsscccess - 491 miter for cutting rafters. ....ccccscsesevcce 946 nail sorter worn by worker.............00. . 266 sliding grip holds board to plane............ 282 Carpet beater—guard for........seseeeeseeeeees 848 Carpet Sweeper—bumper on........6.eeeeeeeeee 677 Carpets—woven of paper yarn..... oe eeeeeesenes 925 Cartography—brave jungle death to map South AGETICEN PUROON. csc cccccccssccisvonns 400 Carts , dog team taxi for children..............000- 610 push car with seat, folds up.............. .. 366 push cart for home marketing........... sos See three-wheel infant’s chair-cart........... -. 286 wind-propelled toy wagons.............+e045 667 Casks—cottages made from............cceceees 939 Caterpillars on grape vines, how destroyed........... doe plague of, laid to bird feeding............... 707 Cathedrals torches on St. Peters, Rome..............- 225 underground pumps to save cathedral...... . 897 Washington cathedral—building for eternity.. 27 Cattle : ditches keep cows in pasture in Holland... 253 herdsmen use electric goad in Ireland...... 358 meal made of cornstalks...........0ess00% 207 119,000,000 animals slaughtered in U. S. A. Seek. SOO. cs choca t 400000 s0N0ns 2 sea0ens 73 oun Hower C608 GE Bi icc icc ecendcsvaavess - 624 Caves endless caverns of Virginia reproduced in wax 273 ice caves lighted by mirrors for taking movies 89 Whipple cave in Nevada.......cccccccesses 541 Coller—to beep FOUS GiF os occ ccscccdcececvcses 503 Celluloid—craft for the home worker............ 495 Cement damp proofing cement block houses......... 490 Gemtest's, Hel GHGs ccc cc ccccesdccscines 863 Soy Gs cnc. dsesksiencsvcenarenewnns 1035 for water tanks or aquariums.............. 139 gun fired into cement kiln to prevent clogging 977 nature knits cement cracks..............0+5 375 secret ACid PEOOE COMERS. oo. cccccescccccese 416 stopping leaks in wooden water tanks...... 493 to remove enameled letters on glass...... ...1041 used in lining Connaught tunnel........... 114 Ceylon—‘‘Garden of Eden apple” tree grows in BE res eer ee ee 2 Chains—non-slip hook on chain...........0.00405 877 Chairs cheap and novel hall dent. s5s.cscsicccciccess 502 folding seat serves as handbag............. 279 Re aries ere ee 852 Te err 669 making woven chair seats.............seee5 680 Chameleon—changes color by shifting cells in skin 92 Charcoal—produced from wood, shavings and waste 190 Checking Machines—check guard perforates face, ee eS eres Cheese what causes holes in, solved................ 47 Wisconsin’s first cheese factory............. 921 Chemistry—miracles of year revealed at chemist’s i SERTERESECTLILIELEEE TUTTLE Tee 14 Cherokee Bluffs Lake—greatest artificial lake..... 609 Chicago, Illinois dodging death in waterworks tunnel construc- rere Sceidut ins sokdeneeesbens 377 _ sixty million depot covers three acres....... 608 Chimes —small bells imitate chimes in radio broad- é CE Wit chan vudhe rede eswe Wet enetues 181 Chimneys—clean, save trouble...............+. 502 Chisels—how to use chipping.................. 340 Chlorine—swimming pools purified.............. 366 Chromium—coating resists tarnish............. 986 Churn—steam churn sterilizer..............-+5 490 Chutes spherical carriers for office messages......... 861 water dip roller coaster at Wembley........ 720 Cigarettes—whole pack of cigarettes held in case 893 Cincinnati, Ohio—electric map made by _ boys ean Oe CRM OE GOUIONIE <i6.accccsisicccvvees Civilization—luxuries for all gift of power..... . 366 Clamps increasing size of C-clamps..............+. 863 PEED is natas cedar GksGcBivbenecdcscewves 799 POPTIT AR MECTIANICS INDERW WOTrTare wrrue Glamees (Continued) _ sliding screws adjust clamp quickly....... 264 as pearl “incubators’’..... ithhehe b4e0b een 65 feared by divers........ RP en 461 Clay—depositing of, stops canal leakage......... 513 Cleaning efrective Cleating Guid... ....cccccsccsccccas - 328 GS eked tensa sabsdeoeseesccawe 501 removing rubber from garments............ 142 Clemens, Samuel Langhorne (Mark Twain)— “Tom Sawyer” and “Huck Finn” (meet BE MCs cuknrieisheedensenenehoaees 400 Climbers—climbing shoes make work platform... 824 — COE Dis ccvsocvedeccevsés 266 ps fastened to shoe top keep rubbers on...... 628 COE CRE ca ccexerrecceusaccvscs 878 elastic marble clock cases, indestructible.... 778 Oe SE a vaca edeebiaeueseaewes 316 SEE GT Gc kc ceca ccceesceicesecces 135 on auto radiator visible on darkest night.... 542 turns receiver on and off for regular broad- CE vc dssaaiap nesses entbeneresscioee 1014 Closet—built-in-furniture linen closet........... 153 Cloth—electroplating for......cccscccscvccesces 748 Clothes Line—tightener for.................4.. 533 Clothing effective cleaning fluid..................... 328 ~~ ed rrr rr rrr ere 81 SE TRU SEs on 00 sani sesvescasces 682 Clover—divider for cutting sweet............... 701 Coal De ced seen ve aeeae 241 mechanical miner digs coal................ 464 Coasters—building a scenic...........e.eeeeeee 140 Colorado—building a ladder to the sky.......... 923 Colorado River—giant dam to harness river..... 400 Colors PE ee er ee rer 450 glasses with blue lenses show natural colors... 184 harmonies from keyboard.................. 217 SE CR ee kek k er ciconwsscuraeees useful germs work faster under colored lights 280 Combination Tools CO Se ev acadacieseusaiespdnacewns 810 shoe buttoner, screwdriver, comb, bottle GEE GE Be nid cvccapecycrcsacccas stove lifter, tack puller, fish scaler, etc...... 812 Combs electric comb that acts also as a drier....... 463 Oe. CD SUUEN i hde ds ss cddneeeenenes 989 Combustion air heater on furnace grate...............- 576 oil proved to take fire quicker than gaso- DE Midis ctntcveccneuns : smoke detector for boiler operated by elec- SI: heed cece sied scene nges zpecseues 952 Communications—pigeons used as messengers in SE agnctctaunenwiiaceneeeaunene 811 Compass camera serves as sextant in aviation....... 40 locating lost rifle pin with compass needle... 508 Complexion—artificial sun tans bathers on liner.. 191 Compressed Air x” om. rere eee 751 cold air flow from oil well runs pumps and en- OO eer er res aia hia ta wt ark cushions filled for headrests.............. 564 Oe Ger Oe Dh PI re cddeesscceccuseees 634 inner tube runs toy engines............... 1028 SY SE Qi wack anes wesee san 514 locomotive’s air pump sweeps floor........ 518 Se ee ee rere 694 portable air turbine motor runs heavy clean- i BCS ch ddhe de bAD Roe densedesese 280 i Se EG ec endear eine Gees sibes 0x0 519 steel lungs to cure bronchial ills............ 120 Concrete avoid crumbly material im........cccecsees 692 brine from ice cream wagons damages streets 922 ceiling drill for comcrete.....cccccsescccses 634 Gam Sor comctete Sertis. .0 wc ccccccceccescce 406 NE a Sie recueeses sie cewek sneevecen 624 sD . DOES Sc ncsvdbwinetadineecd 1034 mixing box aids concrete work............. 159 painting stucco or concrete...............00 4 324 i ak vi awk ad CN ew ake ee oe ewe 265 SEER kb vce tescvctvevenseurecrsesedus 511 sand pan protects concrete floor............ 865 steam cured concrete tiles...............+- 443 using tin cans in concrete walls............ 853 Wie weleer fOr GCOMGIOER, 26. cece cccccscceses 609 Connecting Rod—three-joint, stops airplane power El . iskveveedenresuivedeseravenceteee s g090C¢ -

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6 POPULAR MECHANICS INDEX, VOLUME XLIV, Containers double tube for toothpaste........ reer - 225 for grinding compounds..............s..6+- 857 storing screws, bolts and nuts.............. 700 veyors belt for, from motion picture film........... 1039 plastic conveyor saves time.............+.. 687 Cookers—electric, pail shaped...............4. 110 Cookery—motor turns barbecue meat at proper 983 Cooking "Weensils—folding grill for outdoors fits _ *¢ oi - erorr err e 415 Costly, Calvin inet made by, when a boy.............+- - ——- of Coolidge made a silk threads. . 398 goctea 5S ystems—cooling office on upper floor... 331 Copyholder—to — ee Perr 728 houses built of pressed cork to save fuel..... 209 made of rubber with clip attachment for bot- Pe Md cbdhdhh ochsbusnened ods ceend 988 rubber lined bottle corks.............-ee0e+- 607 used as substitute for straw hats......... 280 Corn ee. CTE. Ge on cc kscericrcesvnesece 682 SE ccc ced acuswhewusseinen sinned 493 houses of, built from school children’s crop at Sidney, PKcddesaseneesaaeene bare 119 re ere re ,ee $25 sweet corn crop doubled by crossing strains 401 Counters—double purpose...........0-eeeeeeeee 692 ta proof, for milk pitchers............. 463 ‘o' —s TD SN oc ckcrcadccedsvceusennns 641 asso champion proves skill balanced on head 805 Crabs—land crabs that eat crops..........++++ 447 Cream—-separating cream from milk............ 156 Crime , fk armored bank tellers’ cages to foil bandits 574 clerks taught to guard bank by shots at DWOMIN ib:n0cscecenscedeedsuen 54 club filled with tear gas to rout bandits..... 17 fingerprints lie science tells.........-+++0+ 353 magnetic disk hunts metal................ 275 radio equip alarm signal system in New WO Givcdccescdesens saneeueanss -. 441 science the modern Sherlock Holmes........ 729 smoke screens used to aid bootleggers’ flight 740 tear gas released by touch of finger........ 241 Cups (dri )—with electric hearing attach- PE pigetcéecnaveceeddosaxiensaked 463 Curling Irons—hair curlers with spring lock to ast SS be din tceerwevbenss0naeesaete eee Curtains cide hae saskedeneeseetecenbenws 462 spring clamp curtain rings................+. 639 Cutters bolt cutter set at an angle..........cccceee 801 fruit shear and bag on pole................ 202 hand cutter for glass tubes................ 573 Dairy—milk bucket gad holds oe. Per ee 686 Darning Ball—of rubber eee.” . 638 RE ea cid s owas emer aw dou kame 988 Dead Sea, Palestine— British po to recover Deaf—electrophonide aids the deat 48 a — for the deaf fit without head- ely inne di & bah ewes eekat 39 Death Valley, Calif.—motor pushed across desert EE ee ee 93 Decoration and Ornament art of —— NON 0:50 wears etn db acaw at 531 flower haskets on —. ODE, 6 cidade cwacntie 912 Decoys—light weight duck..................+. 889 Denmark—prison in Copenhagen seen from air looks like huge wheel.................. 810 a 518 we of derrick men tested in placing statue 737 Pest mprovised typewriter desk................ 680 et i Aw odubcredccesesenciess 332 Detroit, Mich.—where students are paid for go- ~~ Sr 545 price of, raised by high labor.............. 741 Sees TE GU Pin doe ccctsccccvcccecesee 442 toms ies, fossil graveyard into wealth........ 991 as auto power forecast EE Ee eee 289 — dream of ‘ opined locomotive real- on SARA aU RRERMARSECRED COCKE eéeene 2 for ober RE a eee ee 561 8 POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 Digestion—X-rays show how fires of body are fed i 249 Diseases cancer germ seen through camera........... 529 drink of ultra-violet light aids throat...... 6 ear trouble ca by dust breathed by WER. Reueaascekcdvckadanesncers «+. 401 harnessing the sun......... C1 tebeenicameed 587 kill disease by disease...........--.eeeee0s 241 movies cure of sea sickness............... 192 photo taken in stomach........... srestuties 201 portable oxygen tent on cot............ esse 81 skin treated with liquid air to cure ponenins 470 steel “‘lung’”’ to cure ills by compressed air. 120 weeds spread diseases............ éasetoaes OO Dishwasher—rotary action.............eeeee00. 812 Distance—tuning echo from plane to estimate height Of GmalR. cccccccccccecace coccces 602 clams ere 461 how divers gambled lives to save “sub” crew 881 Irish wolfhounds tallest dogs..... aeeave ocon Sal kennel on running board..............000. 207 medicine given dog by tying jaws........ 190 memorial planned for husky that bore serum OO Dire losndesidedvenkiessscciaves 642 places signal lanterns to guide boatmen..... 185 talk with their tails..............0.. ccoce 533 team of taxi for children..........ccccccces 610 training sleuth hounds and war dogs........ 915 Doors detachable oak we ee 812 for hangar cost hundred dollars to open...:. 961 installing “invisible door’..............4. 514 Re MN ks ea ibictk ewer se cuhndes coeds oeeene 857 open as car touches switch in garage........ 426 opened and closed by electric motor........ 640 Drainage ditch draining Zuyder Zee................. 944 - electric pumps make farms of flooded acres.. 190 ra’ making perspective drawings............... 339 making perspective sketches............... 493 reflector makes drawing easy..............-. 896 brass drift block on drill press.............. 685 ceiling drill for concrete...........000e0e 634 combined, with lathe for radio builder...... 636 four bladed “= See ae 999 how to use twist drills—Part II............. 165 repair for worn keyhole of chuck............ 866 octors’ pills from hothouses........... 66 Dumb Waiter—novel ......................... 512 Dunn, H. H.—Forest planted like wheat........ 251 ear trouble caused by dust breathed by GS z.chceveaubadek) ces cae kiwsaed 401 from volcano in air three years............ 607 Ween FoF GHG MBG 6 ccc ve kccacnsecssces 925 of the air to be made useful to industry...... 189 ge ee eo 11 E Ear—exploring mysteries of...............00055 955 Earth—weigh floating earth crust from a _ sub- SE kk er wtderswhdegrsssvdveacvwace 945 Earthquakes ll volcano observatory.............. 48 mountain falls into river and makes lake..... 432 sinking of ocean’s floor cause of........... 406 Tokyo to build memorial to dead........... 928 Eccentrics—turning and boring................. 514 Eclipse—expedition to watch one goes to Sumatra 892 Education Ford auto school pays students while learning 545 toys with motors help to develop the ed 710 Efficiency—science aims to make work easier. 22 Egg Beaters run by water from faucet................. . 267 spoon shaped with bottle opener handle..... 110 VN irds’ eggs gathered by thousands in rowboats 789 CO Ge I occ ce zecsctcccvesssece 988 exported from United States, 30,000,000 CD hopped e002 es heere dese enenbsces 999 fish, hatched by hens... .....ccsccccccccces 274 separator in shape of a cup................. 463 spring wire holder for bored BE. ccameses 638 turning eggs in incubator.................+ 171 wrap cracked egg in tissue paper to boil.... 843 Egyptology—grains well preserved found in tombs 761 Eiffel Tower light, as ad for auto factory............... 602 RRR GE COUT icc ons cece s cegerceyeeees 434 1925 Elec Elec Ele« Ele Ele Ele Ek

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POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 7 Electric Batteries SSSOMBEME BEB. ccccccccccccccccsecsssccece 842 radium battery everlasting........ Series iibeets u- recharging dry cells............. a shuatae aati solutions that “charge” storage batteries.... 852 two cell lamp one for three cell if too week séasscase<s PRP Sr eevee 1029 ctric Bat Charger - charger with senaavenile terminals..... « 297 magnet charger on battery..............06+ 749 ectric Bulbs - light bulb used to cook and bake food....... 954 manufacturers seek a sizes in electric light bulbs..........sesesseeseeseees . 945 protecting electric iamps from vibration... .. . 331 two filament light bulb.............. anaes 977 without filament............ Siwkten kien eee . 461 Electric Cookers cooker works on lamp socket............++.+ 813 electric heater fits Lettle for frying dough- OOS pnceuseneds Pb eeA oh onbomesen ee 967 improvised —_ CO da ysis ce kcianwese 494 light bulb used as heat element............. 954 sandwich toaster in cabinet used lamp socket 449 Electric Current—alternating and direct current CESUEE ccccccvcedeserese Seb eneeneeses ee 1048 Electric Heater fits kettle for frying doughnuts............ 967 improvised electric stove..........seeeeeees 323 Electric Irons flatiron beat controlled by automatic cut-off.. 72 folds up when not in use.........-..2ee0e. 6 inpeeeene stove made by means of electric eee eee eee ee eee ee ee Electric "Lighti Fixtures candle sha lamp lights only when lifted 4 dims lights to any desired degree.......... Electric Motors—small, fits on ring............ 383 Electric Power cost of largest power plant............... 447 ~~... ¥F eer eee 119 Electric D. - -epaittanapnsei train een by ins Electric Stoves—compact, ereeeaatpice on. wall SRE eccccwenscsswedestdaescdssses 639 Electric Switch high switch reached by swing step......... 1041 homemade knife switches..............0++. 325 safety guard on power switch.............. 161 Electric Wiring insulation . Pere TT TEP CTTT TTT 463 placed waist- -hig! for convenience........... 271 strange “lingo” of limemen.............. 393 tester for determining negative wiring line 861 threadless conduit box cuts cost of wiring. 376

Electricity auto stopped by static started with chains. 224 beats steam in race of trains.............. 913 centenary of electricity......cscccscccccecs 101 danger in filling gas tank avoided by ground CE. a dandécnces Sit gbd46stenek ate eee 407 electric don’ts bibihbse shiek Cee aeekbw ehae girls taught electric terms to aid housework 629 handling lighting current safely............. 682 herdsmen use , & tric goad in Ireland....... 358 model of electric dwelling................. 433 modern burning bush seen by campers in WE eck ait Wace ewdewae eae sie 32 eae, kerr 864 oe. eee 258 voice in pictures on screen while person CHUN: videden ba amededs acne anes das akone 399 Blectrophonide—voice producing vibrator aids the P hetihs bewbhedeageceaieiekededehwe 44 Electroplating for cloth makes it waterproof............... 748 portable electroplating set operates on bat- ONS -Venpesseondene PROPOR RCOS EONS ES 360 Elephants cold cured by inhaling vinegar.............. 792 help hunt birds for museum specimens....... oense: ti Si I, Sac cnctub detache ax ax their paths used by motorists in Africa weight of, held up by bottles............... ators chainless steel grain lift................. one ee increasing safety of freight elevators........ 1054 Emery Cloth—clip holds, Te Wibtehénkcntecs as 700 Enamel applying undercoat of..............0-005- - 158 — on Disa oetneteidetisecewedens 866 ov avieswadensaons 785 Engineering teats o nature..... RE SPERM 738 English Ch ossed five times, beats most CE titabateerbctcab se ohacunesce 783 eee tight socket engraving machine works from ght socket ..... eer ee 1009 ae life of typewriter eraser............ 681 revolving eraser serves also as penknife...... 360 SE CP CR ccd ca sbhetnneeycokeneseeks 520 Dutch scene done by typewriters On tee teeta elec 740 Ethnology—mound builders’ mystery partially DEE NEG deter eannehensedbeunetecsont 987 Sucavetens ditch scraping plow cleans gutters.......... 886 as pile driver........ Seeehentonseeces 874 Explosives —'t death behind the dynamite crew..... 377 last turns Schuylkill river into new aaa 60084606000 0000666 a 717 non-explosive oil ae eb aeanait a Pant 741 water frozen so quickly as to cause oe 532 Peeters —jounsed arch at *San Francisco. . 21 low of, in darkness due to reflected light... 398 GP GN Si 6006600088 se ctkiescesccse 371 F Fabyan, George—Solving mysteries ...__. 817 Farming GON BOE GIN ok oo ceca cieccceccsccsns 331 electricity to end farm drudgery............ 258 ee EO ss oiemeeddss oes cewewe 333 Faucets—washerless and drip proof.............. 105 — Posts—use for broken steel............. 1035 ences holder for driving staples.................. 538 SG ia be A dere a-sS bn veeoua ne 696 Fertilizers en ce candebeles beak cewakeusawe 427 spreader geared to wagon.................. 458 Fiber—carpets from string beans................ 727 Field Museum, icago—with pigmy cannibals Dy CEE GA citbscedenicccecastacucen 595 Files and how to use them............ .. 688, 1043 ND be vnnsaenes eed stu tees cantaeteseece 139 i lt Oe Ss snk ccenacricedbaaewe 73 Oe nicks asdadnn onsevecees 109 Fingerprints i, Se ROR. os cccdcevesetsesevessss Bee tracing Uncle * eae family with fingerprints 459 Fire Apparatus ee SON 6 cc cdnneees beens nsae $72 sf fC ee 878 pump run by auto wheel.................. sliding sled on fire ladder aids in rescues... .. 719 Fire Id, motorized by adding auto EE ad eneeedscbadWewadkstadsenbovbes 449 Fire Protection automatic fire extinguisher for flyers....... 106 fighting fires from trains................... 96 ON a er ereee 99 Fireplace made air furnace by heating system......... 814 WE WE dunttcedcovtudevedidesces cue 850 Fires . air heater on furnace grate................ 576 COrGlensmens 28 ATE CAURE. 2.2.6. 20 ccs cs csnee 73 danger in engine oil greater than che 376 fire alarm training school................. 906 modern burning bush seen by Wyoming COMIPETS nv cccccccccceccccvcccccccccces 32 removing stains caused by................. 686 a, Mah cake wenteksa en sihdees wes 940 First Aid Ce ND TER cosh ies dececdaecwcess 1034 how to treat cut moor (ee eDdaneh Cetbdansee 894 Fish ee 274 SS EE ere 383 ground into flour after cooking and drying 370 ay Ae ES Ere ear 547 in tanks become seasick on long ocean trips 978 imewem extracted from........csccccccceeses 766 mystery in habits of fish to be solved by tags 610 “gO See ee ere 668 rings on scales of salmon reveal its age. 65 survey of Pacific Ocean to enlarge food Pn Seetuctetethendash bub sw ndeaees 740 a OE ee 928 trained to eat out of hand................. 922 whale battle in Polar seas.................. 744 adjustable fish rod holder................. 736 automatic mechanical fisherman............. 851 POPULAR MECHANICS INDEX, VOLUME XLIV, 1925

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8 POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 , (Continued) bow and arrow used fdr fishing in South eR er err reer es ° can for live bait, cigars and matches....... 25 Saiene Ter GeO. once cccccecescveseses 807 costly reel for catching tuna Bibs iccvascndas 960 improving the swivel hook.............+++++ 350 making case for fish fod... .....cccecccrcces 841 sailing ship in salmon trade............+.- 242 es ERE CP reer re 1018 a a 0 ee ee a .. 940 nine thousand new, used by post office yearly 77 Flashlights have lamps on side and clips for belts....... 113 eS ks oe Se errr errr 392 Flatirons—electric flatiron heat controlled by automatic cut-off........cse00. es ae a 72 Flies Ce Tee CN 6 OM, oo cca vearsndaesenss 142 installing “‘invisible door’? to keep out..... 514 IN ME Ns bu ig bb a p's Ohad. ok ae re ees 329 using vacuum cleaner as fly catcher......... 677 Flood Lighting—homemade adjustable floodlight. 150 Florida islands made overnight to link cities........ 357 toll bridge to cross Florida Bay.......... 630 turning fossil shells into wealth............ 991 Flow—measuring sewage flow.................. 1041 Flowers Pt C0 TOD OUI. iss ccd ceccavaxdecsase 912 bed built like bird SE eee er 502 gassing fruits and flowers to keep them fresh 953 grown in ship’s hothouse................ 236 SE Meek cedditavins dn chaevinkaced 952 Flues—motor for cleaning... a&........2.e0ee00% 416 Flux soldering flux for iron and steel............. 151 NS EE rey re ree 1040 Flypapers—and poisons...........csceceeeceecs i Food animals slaughtered in this country last year butter made from tallow 5 fish cooked and dried ground into flour...... 3 gauge tells what to eat to keep figure trim 253 hunting birds’ nests fer soup 2 learning to feed the army and navy........ 971 meals on dining bok cdeneac nav chee nh 603 protecting nation’s food supply.............. 290 seaweed a food of Japanese...............-. 375 survey of Pacific to increase food supply..... 740 value of, shown by tests on treadmill....... 359 Football—scoring board for football............. 58 Forests and Forestry forest planted like wheat.................. 251 Oe ee eee ere 611 Forgetfulness-—saving dollars with knots........ 267 Fountain—radio controlled fountain Se aes ee Se 985 Freezing Geet aid to freezing lames... .. 2c cicccccswcce 1029 freeing auto bearings.............. jccceae 1042 i a eee 968 Fruit cherry stoner pushes pit through hole........ 988 “garden of Eden apple’’ tree grows in Ceylon 282 gassing fruits and flowers to keep them fresh 953 peaches pitted by machine.................. 762 nn A Oe eee 11 Se NN ee Pc ai ca a ckewes cn vcccess 202 NNN on tn dk sa cmrabanes ne aenscetecdée 812 Fuel—pressed bark for fuel..................... 161 Funnel—for gas tank...... Ee 2 a 857 Furnaces air heater on oe 576 conserving furnace heat.............cccee0. 858 smoke detector for boilers operated by Oe RR reer eee ong ae Furniture—preventing bed from marring base- eens fee eee 156 Furs—growing fur coats on farms.............. 83 G Gage, Earle W. Call hunting in the northern wilds......... 444 The Centenary of electricity................ 101 Galoshes—repairing ......cccscccccsceccpeccces 1018 Game Preserves—iarms leased for a dollar in Ohio 108 Games—European war game fad in America. 99 Garages ee RN a kab edad nitions divaeiees 665 doors open as car touches switch............ 426 ee ee ee eee eee 502 enter and exit signs phrased in motor terms 945 NE SN MINS ca code wwicweecescccsccs Garage—Equipment and Supplies auto elevator like seesaw aoe ee re 970 WEE doecanscecstGneranua vas kcabeone 10 POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 Household Devices: (Continued) Illinois—s wamps converted into field by means = Garage—Equipment and Supplies: (Continued) combined auto stairway and elevator....... 862 containers for grinding compounds........ 857 PND TEED au tavadéccsseeuncnesana 518 platform for ‘washing autos................. 157 sand pan protects concrete floor............ 865 swinging booms on service Car............65 164 towing rig for service Cars...........e000. 347 Garbage—baby proof trash oe sm Fae a mk Rae Garden Tools and Applianc OS OR WO inidevees cctvevsnce ted eene 640 one handle for five tools............c020. . 384 Gardens—fiower bed built like bird bath........ 502 nates: Ny gas cock prevents accidental open- Metekn wes thi eena hes ake PAs eee 77 Gas nt ‘Oil Engines—airplane engine value drop Co Ge GE DO is cccdcicscasecians 921 Gas Burners . gas range and air furnace combined........ 987 Pee See GU Ge Win 66 8555 ce ccnvenne 282 Gases fighting insects with idee aaah als arate ; 567 harnessing war gases for eave times. .-... 451 liquid gas in steel bottles for filling auto CGR, Sid isis in .v'0s 40d vesceeexenaaenee 1000 SONG. NE GUD GOERS osc ccias caeewkseesees 968 SUE GUNES WES 5 6c déccecteceeeeboucwee 702 Gasoline filling stations in England equipped with SE GO Kui cccvesbessseviecusp cobs Son Sm Ee Ws vest dt tnceevsascstasere « 329 Gates auto stile over farmer’s fence.............. 1054 collapsible and extension for porches........ 989 opened and closed by electricity......... . 640 Gauges air meter on hose is set at exact tire pressure 184 emergency method of finding wire diameter 16( focus auto lights without dark room...... -. 96! for auto tires at filling stations............ 751 — -_ errr ee pocket dial tells drill sizes.......ccsccss - 442 smoke detector operated by electricity...... 952 OU EE I Bs oes diuivecckcadsesasassahad 253 wrench fitted with gauge for setting screws 338 Gearing ‘ protecting the dividing head................ 162 removing stubborn gears.........ccccsccces 863 Hawaii te fee BO CONbibent. oc cccccéccues 646 mountain in Wyoming falls into river and rr era em 432 scientists read age of earth by exploding CE son thas 6 be enseeerinaneees ocen 204 sinking of ocean floor cause of earthquake. . 406 steam drawn from wells to drive dynamos. 461 “world apart” yields giant bones............ 941 Germany—elevated train controlled by cable. 601 Germicides—antiseptic fluid kills germs........ 607 Germs grown on farm to supply schools............ 736 useful, work faster under colored lights. . 280 heote— haunted houses often mean loose water is awe men 576 “Gjoa”’ (ship)-—. Amundsen’s ship exhibited in San DOE: Se icncceecnan saunacdd es . 181 Glass auto stop sign of prism glass............. . 768 bottles hold elephant tk eee 886 om f in old*stained glass traced to plants.. 224 hand cutter for glass tubes............. ea ae a be needles make glazier’s points.... 682 reinfore for auto windshields............. 823 remove enameled letters from.............. 1941 repairing cracked windows................. 695 ne ag. Re re OE ee erm 619 shield of bullet proof ong ae ah oe life... 256 stop signs in Washington, y reflection of prism "mee ME CE Cee eee 768 tapestry glass for interior.................- 426 used in wall mirrors takes two years to make 275 Gine—half soles put on with..........cccecccess 752 ~*~ iia EL I 5c bacdeeascamaad 944 Gol light and bulkier to aid art................ 721 Solomon's gold mine in Peru............... 768 yearly total for arts eighty million dollars.... 53 Golf aluminum sole on golf shoe............ .. 814 we eee 441 Gem Tee: Broewe head . oii icc cccsceccccccs 365 Sa eee 642 folding holder for golf bag fits running board photos taken through glass to study golf poses 800 scales for clubs and rackets show leverage po eae, . ee ~

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305 642 4, 800 53 POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 9 Continued) acy Be and golf balls tested on motor driven BONO nib cea pieeeceesdeessace waterproofed golf clubs make wood ike metal 806 whedl attached to golf bag........... teen: ae Gourds—bird houses that grow from seed........ 158 ee 4 in Egyptian tombs well preserved.... 761 homemade wheat dusting machine......... 1 was r a crete corn crib........ sce adwKS Sean ee easily made bins.......... bisGeuceserecan 526 Grass—removing, along fence.........+.+++s++5 323 Grasshoppers—found 18,000 feet mg | sea ee 365 Graters—food grater with glass 1, 47> opper . 639 Great Lakes—unwritten tales of the inland seas. . 793 Great War 1914-191 battleship bow forms memorial of battle of ZeeWeaGe | 2 x6ncsn cr sigbecsdsecncecsss 925 Canadian hero graves ‘marked “by. lighthouses. 811 England to honor animals killed in.......... 3 Greenhouse—made of storm-sashes.............. 524 Greenland—coast of, receding from Scotland. 107 Griddle—greaser, white enamel, removable wick.. 638 Grinders lathe grinder made from electric fan....... 866 making light ball bearing column grinder.. 516 Grinding and Polishing holders for grinding Ra i: eared komad be 874 surface grinding in the Jathes............ - 172 Grindstones enh GROUE c5 cca keke bea civings ec arkedesaves 1036 number of sizes and types “of, reduced. -- 892 Grips : m screw driver blade holds nuts in place.... 553 V-shaped rack in handbag keeps clothes Pressed 2. ccc cesccceececsseccecs . . Groover—electric, for weatherstrip Rite aaaee 970 Guns—fired into cement kiln to prevent clogging 977 Guns (Ordnance) anti-aircraft machine gun shoots three miles SS Sere ctrtbethinadne Dat aesee bees army anti-aircraft gun taken’ cei e esas 6 on 986 big gun carved in stone honors war dead.... 889 finder for anti-aircraft gun..... Ee 792 giant coast defense gun runs on railroad.... 898 trees planted with cannon....... eosta Gee Guns and Accessories—restoring a rusted rifle. ... 494 ee 8 Err errr rr eT ier 507 Heating Plants does your fireplace smoke?................ 643 fireplace made air furnace for heating system 814 GM FOGE im MOVIE PRINCE... cccccccvcvccecs 761 Hedge Trimmers improving hedge shears.................055 851 run by flexible geared shaft................ 249 Heller, — pigmy cannibals in the Reine pedeeuecbtrtatbe sks senses 595 Herbs—doctors’ pills from hothouses............ 66 ee child in family likely to suc- Ml shbwencbesetarenuuendavcwitsawiwe is Heroes—martyrs of science..............-0ee0s 49 Hoes—hoeing large weeds...............0c00008 349 Hoists ee ES er ee rt eee ee 142 skill of derrickmen tested in placing statue.. 737 swinging boom on auto service car........ 164 ers can wrench and holder for the housewife... 462 egg holder made of spring wire........... 638 faucet attachment for tea kettles.......... 812 OS ESTEE 874 er Se GN cb cswicaccadenceeecs 520 Sy TR GR cb bo sa dcvaennccesrasaese 490 boring straight holes with lathe............ 1040 how to bore very accurate, smooth ones.... 687 tapping holes in small steel rods............ 701 SEE GUE WN a cccberesstanswade 525 Holland Dutch draining Zuyder Zee................ 944 OSE Sa eee 469 “Holy Basil”—plant to combat mosquitoes...... 39 Home Builder—Questions and answers...... 879, 1055 Honey—"‘‘sick”’ pearls bathed in honey.......... 533 Hooks eee 693 mower guard stretcher grips................ 315 CORE ROO CU COs occ ccccnenecensaces 877 Horse Racing—fiber helmet under cap for jockeys 898 Horses auto for every horse in U. S. A......... 89 cow ponies killed to save food for sheep.... 617 gas masks for army animals............... 647 round snowshoes for horses................ 990 SE SE, Se biacasss wbeedeesnands cess 591 SS. COE Cao cksdidentbdhensivede 719 SC ND as te riiies ose scencasa 237 Hose—using garden hose in winter............- 840 Hotels—hotel above office building............ 777 House Moving—nothing built too big to move.. 979 Haan, E. R. Household Devices .-110, 286, 462, 638, 812, 988 How to make a tapped collapsible loop.... 825 apple corer and slicer.............000ee000: 462 Loops: how to use and select them....... " 659 bathroom fixture, interchangeable.......... 812 Radio batteries, their care and selection... .1010 beater, egg and cream and sharpener com- Hacksaw—frame takes fine and coarse saws...... 865 UN sch stiatctenssanwheenanessnsess 462 Hail—stories of big hailstones supported by beater, egg and salad, ‘run Oi Es secaeua 287 OE sa x6 asda etscesestvaseadeened ks 553 beater, egg, spoon shaped has bottle opener Hair MOMENT pavsneegeeceddcsacencrsccccssas 110 electric Grier fot the Oi iics 55s 60csesssws 607 bed tent with window ventilator. . 2.20.2... 287 monkey hair substitute for gold in finger rings 248 bottom for kettles, adjustable............... 638 Hammers broom with renewable filler................ 812 Commend 00 TE, 106 bscrcintcsecssseces 586 brush cleaner for carpet sweeper............ 286 rubber pads in hammer head absorb shock of Rs MEE, ob bccwewsienne ee b4 65504 s00n0ks 989 DROME eta eee Ca ORR ate 11 burglar alarm and window lock.......-.... 638 Hammocks—for students. swung from benches.. 112 cabinet for baby on rubber tired wheels.. 287 Handbags cabinet handy to kitchen sink.............. 988 folding seat serves as handbag............. 279 can holder and wrench combined.......... 462 V-shaped rack in grip keeps ~ Nh in shape 92 CAN OPEMEP 2... cree e ee eesee seen eeseeneces 639 Handicraft cart, baby, on three wheels cannot tip...... 286 art and utility combined in................. 592 Cart Gor POMP WNPNNINBsis ccc ccciccccscs 110 snapshot statuettes for Christmas gifts...... 1021 cherry stoner ....... pes senenescccs*teverces 988 Hangar—doors cost hundred dollars to open. 961 clamp fits clothes wringer to bathtub...... 286 a bands on coat hanger hold gar- comb, electric acts as drier............... 463 ae eR er ee ee 857 combination tool—hammer, stove lifter, tack Hardening (Metal) “hardening small tools elec- PU, COME once veisessvenscccscceces 813 REE SIS See ee ps aes 33 combination tool—shoe buttoner, comb, bottle Harrow—hblade sharpener on a disc harrow...... 460 OPOMEF cree wccccsserccceseccccscens 989 Hatchet—hammer changed to...............00 586 cooker, Clectric, Greleas.. ..ccccccccccsvicocs 110 Hats cooker, electric, lamp socket operates....... 813 cork instead of straw........cccccccccccce . 280 cork, rubber with metal clip................ 988 preventing straw hat glare................ 323 cover for pitcher, flyproof...........secse0. 463 Hawaii—to form a continent scientist predicts.. 646 cup with electric heating attachment...... 463 ay ES eb keG ir caNes es tae ndon onade% 111 color of, measured to determine quality. . 229 Se CE SE WI i occ ccscicccckusassc 639 divider for cutting sweet clover............ 70 Se ere scw e x. 2 ae 857 darner, ball of rubber. ...........cccecceees 638 mae, eee 337 MRR Gia iuiceh ihaawanekcaeceaetna 988 time to cut, to cure more easily............ 969 disc put on jelly before paraffin............ 639 Health—hx ‘ding breath a health test.......... 433 I SE ae. ca kew. eviews badaneeae 812 Hearing—radio fatigues ears tests show......... oa ND ie. cca we be olmeieb a Oi 812 Heaters egg boiler, dish-shaped..................... 988 for water supply of home uses kerosene.... 463 egg holder of spring wire.................- 638 fas range and air furnace combined kw aa egg separator, cup-shaped.. ............... 463 oil burner for melting tar................ 61 electric candle atick ......ccccccccccccces 638 POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 11 Pay LS ..- Light: (Continued)

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10 POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 Household Devices: (Continued) 3° gO Reser eet rrr 812 gate, collapsible and extension............+- 989 go cart, coaster and walker for baby........ 988 grater for food with glass hopper.......... 639 griddle, copper and steel............++ee4+- 462 griddle greaser with removable wick........ 638 heater, kerosene for water supply........+-++ 463 heels, rubber easily slipped on..........+- 813 holder attaches to faucet for tea kettle.... 812 eee SOF GUO WAGs bcc c ccc accccecescases 989 holder of wire for paint brushes............ 639 ironer, electric, folds up..............+6+ --- 638 lamp, electric, on wall, with current-saving MEE. 24s-sc0ccenctehettedeeseeaeanees laundry tub, rotating, has three compart- EE: cok antedece ene heennkeceseenneas 11 lid fits many sizes of pams.........-s.ee000% 813 masher, potato, can be taken apart........ 989 milk sterilized for infants..............+++- 988 mirror, ball socketed, cannot fall............ 988 needle case assorts contents...............- 812 pan for cakes has open spring for sides...... 110 pan of aluminum requires no grease........ 463 pancake and egg turner works automatically. 989 pin cushion to wear on wrist.............. 989 pocket within a pocket........ccccccccccece 813 polisher for stoves in tubes................ 813 OR ee ener) reer rer 110 SE, SONER oink cancnsencectascnws 286 refrigerator with drawers and water bottle GR WD n cccsccceccesosccccecscccsccesces rope knots, holder takes place of............ 813 scourer and knife sharpener combined....... 638 scourer, rubber mitt bronze covered........ 110 scraper for aluminum stencils.............. 462 screwdriver holds slot with jaw............. 812 ee nee 812 sharpener, steel disced.......cccccsccscces 286 shoe protector for auto driver.............. 988 sleeve protector of rubber.............2.0. 630 spoon has hook on handle to hold it on edge Er nr 110 stove, dau, can be bracketed to wall. 639 strainer fits tea pot and can be removed... 989 Se. OE OR crcacsceeavansoasseccans 638 DERM Sed bGxoaadweniahdwvae ones eaeneke 286 toaster, folding, for Cig caicadaaensnen 287 Seer 812 wardrobe folds and hooks on door.......... 462 water softener, portable................... 111 window washing RES EE Sey sete? 110 wire insulation stripper.................00. 463 wringer attachment esses DON. os ccawen 813 House Plans five-room house for forty-foot lot............ 351 homes for lean purses—four, five and six DE? Sis hadeteedens sods vetasenneen how tg lower your building cost—six-room EE er ere 703 inglenook and gray shingles—five-room 1 1055 of value and distinction—six-room house. . 27 six-room house—hollow tile stucco.......... 879 Houses—built of pressed cork................. 209 wanies big game animals increase in national forests 473 hunting in the northern wilds.......... 444 lightweight ee ds snr sp Oe Ee 889 Hydraulic rives railway car in Sweden. 939 Hydroelectric Power artesian wells run turbines................ 447 greatest artificial lake...................... 609 i built of wooden staves................ 593 tides = Bay of Fundy to generate.......... 959 ball Eeainey tester eliminates scale reading.. 307 battery has built-in visible hydrometer 125 aa ee 2 metal flying boat has sails.................. 24 plane modeled after flea.................... 976 city life more healthful.................... 415 Se ere 824 Ice Berm. te howe... ccsscccescvccscsveccsss 1020 hoisting ice into refrigerator............... 347 ice mine in Black Hills.................... 810 moving ee eee eee 1028 removing icicles from flat roof.............. 1029 swinging saw cuts ice............-se0.ee5. 1039 Icebox—storm window inclosed makes “icebox”. 849 Ideas—don’t throw away your...............05. 745 12 POPULAR MECHANICS INDEX, VOLUME XLIV, Illinois—swamps converted into field by means GE GHOCRESE QUNMIGE. 6c cc cccccsccccsnesoee 19 Incubators electric, heats eggs on top like hen........ 359 I Oe er Pee Pe es ee 841 for butterflies run by electricity............ 822 CRE GUE. BBs os ots nea e ctcvcesveponsnes 171 India—elephants help in hunt of rare duck in NT Sin piuidingwatiew toe ieee twee 48 Industrial Efficiency—locating the oiler...... soo S12 Industrial Hazards—nails most dangerous in in- CE ietncancdntshebuk as ssbansesenat 776 Industry how science is transforming industry...... 203 strange ways of earning a living............ 115 Infants bath cabinet has drawers for clothing below. 287 getting better photos of children............ 138 making baby walker safe.............-0008. 143 supporting baby’s bath tub............... 313 three wheeled chair cart..............0+4.- 286 Inks—reviving inking pads................00.- 499 Inlays—inlaid glove box..........e.seeeeeeeeees 670 Insects bats enemies of insects... .......cccscceseee 785 census is ge ae rr re eer 425 DOE Gh ci bbb essierereseccevecseaseees . 970 Peer rere rrr 567 flies that eat bugs imported pi beatdh oe scene 235 keeping insects from spotting painted sur- WOR thtdnowincsbseeesssacaneceesneos 849 lady bugs war on orchard pests.......... 544 pick birthdays to conform to weather........ 805 CONE WEENIE oben e. o0.0008005c0400"000 338 Insulation (Electricity) element sensitive to light fireproofs wires. 229 insulators bigger than man...............++ 544 Insulation (Heat) SOOGUES TET DDO son csc ascivnccesete 265 houses built of pressed cork to save heat.. 209 Insulin—extracted from fish.............25e0005 766 Inventions MO Che TANNING. io ic.c006 co ccvcccesasis 79 don’t throw away your ideas.............. 745 necessity is forced to mother another inven- tion and saves used nails............... 75 TE: , WR snk Saecasxteevseccc asses 640 —-e pencil iodine holder............. 777 ron coating galvanized iron before painting...... 347 es flux for iron and steel............ 151 wealth from low grade ore promised........ 820 Ironing Boards—combination stepladder, wash tub stand and ironing board................ 839 Irrigation giant dam to harness Colorado river........ 400 bs Temopim GCOS GUOR. 6 anc cctcvsccccecesecs 324 Islands—made overnight to link cities.......... 357 ee ee eee 235 Jacks ; P auto jack like self-starter run by car battery. 425 i CO IIS 6. ok ok cdickawenaceiscaee 675 Janitor—engineering course in college.......... 414 japan—seaweed a Japanese f grey ene 375 Jerusalem—glories of old at Philadelphia fair.... 743 “monkey hair ny eee phi eke dssekeeien 248 of A DO NS ilk we aens keae eae aese 647 prohibition - A. method of polishing.... 999 ER ee 53 ——— fire tenders hired for jewish holi- ioe igs—for drilling rer rae 662 ones, Robert Taylor—Does your fireplace CRT cvkenpadanhs Cesenso ches cen abed 643 Jopp, ao oreeneeditieoe most hazardous profes- . pb meeees PE AEA Were ee 69 BOR. bcs p cab ed pawns 605 £65 436600000008 163 Kennel—combined wood box and.......1222277 316 Kerosene—better light and no soot from kerosene eee Poubeavadsnsbvedsenndseztuse 999 Kitchen Utensils aluminum pan scraper................000005 462 apple corer and slicer combined............ 462 cutting board for kitchen cabinet........... 850 disk inserted into paraffin to allow lifting Oe BUD ccceec were pesin eens cd ees vesese 639 grater with glass topped hopper........... 639 grease for griddles, etc., agen like an iron, has removable wick............2.-0200: griddle of copper and _*__garaeeebaotarets 462 1925

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347

POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 11 Kitchen Utensils: (Continued) holder for steel wool.........cccsercccees 989 kettle rest, adjustable to "different sizes.... 638 made from ice box shelves............+e++5 11035 mending cooking utensils..........--+++++++ 675 pan of sheet aluminum requires no grease.. 463 pancake and egg turner works automatically. . 989 potato masher, can be taken apart.......... 989 rubber mitt, bronze covered, for scouring.. 812 Kites—flying a "drinking cup Te eadene "1035 Knives jackknife in handle of letter opener........ 14 scours and sharpens at same time.......... 639 Koontz, J. Dumping body on the farm truck........... 859 Mixing box aids ge ee 159 One-man barbed w a 1037 Kuns, Ray F. idles | a a light ball-bearing column QUMMET fc cccccceccosvscesvesseceveccies 516 L Lace ; expert at restoring old laces and tapestry.... 407 trees yield substitute...............eeee0e- 728 Ladders ball and socket stepladder...............-. 98 combination stepladder, washtub stand and ironing board ..........eesseeseeseees 839 crosspiece on end of ladder aids in house painting Cec c cer erserseseseccesseseses preventing them from slipping.............- 490 stepladder improvised with two chairs....... 324 Ladles—heated by electricity keeps contents ~— 11 Lakes—greatest artificial lake............... 609 Lamps—hetter light and no soot from kerosene... 999 Language girls taught electric terms.............+.+- 629 names of garments traced to many languages 992 strange “lingo” of linemen..............+. 393 WOCdS FOU GE MOS. ..crcccocccsoscsevese 458 LaPlant, E. W.—mover of buildings............ 979 Lasso—champion proves skill balanced on head.. 805 Lathes

bed used for anvil destroys accuracy........ 869 boring straight holes with lathe............ 1040 combined drill lathe for radio builder. . . 636 full workshop in single tool.............++. surface grinding in the............-.-++.-++ Laundry clothes drying cabinet fits over radiator. 681 combination stepladder, ironing board and WEE OE ck nihos dn dbnteecenacese 839 easily made clothes chute................-- 313 ’ folding holder for clothesline................ 665 shaving soap for washing machine........ 851 tightener for clothes line...............6. 533 tub has three compartments...............+. 111 Lawns—lawn renovator..... ..ccccsccceccssecs 339 Lead for high pressure packing...........0+++e0 686 process for tempering.........-+--.--eee00: 561 scientists read age of earth by exploding atoms 264 Leather hides tanned by electricity ................. 40 bk, 141 painting CIEE GR oc cd acecccccceccces 669 porpoise Seen aS SOUTCE........... eee eens 572 science to improve, and make better shoes. 60 Leaves—how many leaves has a tree............ 105 s dentists’ magnifying lens for mechanics...... 513 glasses with blue lenses show natural colors.. 184 Letter—jackknife in handle of opener............ 14 Libraries—Paris war library of thirty thousand . DR ad neads on40aneeeséaeneeesesecwe 62 Lids—fits many sizes of pans.................. 813 Life Savi how oo gambled lives to save crew of “S SUSE h canes tae Reeds oe eens ds <ee 881 _.. rs save gas, shock and drowning victims. 762 Life Saving Apparatus inhaler against smoke suffocation........... 914 sunburn collar and buoy combined.......... 648 Light artificial suns tan bathers on liners.......... 191 crisscross canvas awnings admit more light.. 978 deadliest ray is reported...............000- 293 drink of ultra-violet light aids throat treatment 6 for airway regulated by sun................ 721 invisible, for signals to fool foes in air...... 112 plants work overtime under PE POUR NE Mek da wncenbsascciscccdc 566 stop-signs of prism glass by reflected light.. 768 sun replaced by electricity to preserve paint- Light: (Continued) useful germs work faster under colored lights. 280 SE 1, GUIs 6-55 04 0 n.c00ccncsenseces 555 hthouses beacons that guide flyers................005 graves of Canadian heroes marked by light- ML Ndedhuudsuenesdvchvelensntecests 811 GE. Sac tuiuvikihchvhinshngue aeons 217 wrecked by ship, salvaged by derricks...... 425 Eiffel Tower lit as auto advertisement..... 602 freedom’s torch kept weg by \ appennmpte . 450 homemade adjustable floodlight............ 150 Lake Merritt in California aE Per 912 Niagara Falls illuminated by billion candle- POWET nc eceeveccccsssnccsscccccscces 185 inting with acetylene i cctbtenvendee 491 oman ruin traced in lights for war fete.. 431 sawmill brilliant lights permit working at

Dn. svetittbisabibeedeecksuceetsenees tapestry glass for interior...............+. 426 pee Fixtures—indirect ...........0500se0e: 1050 efficient lightning switch................06. 124 Se GR dccncocecanoscccveses 241 statue of Miles Standish................... 776 where lightning strikes twice................ 402 Lime ee MO, MS hick vc cweecde see case 811 pulverizing stone fences.............esee5% 163 ae Y= magnet fixed motor on —_ oe — ” Li le a re 493 Lions—battle film monsters shown in COB savas 406 Liquid—ladles heated by electricity keeps material Dl Ktisabadeoatstasesusewesacneae Loading and Unloading automatic box car dumper cars unloaded by vacuum...

chainless steel grain lift............... ee Mc dcnenedccnsecsnsecis electric hand stacks brick...............06. 3 handy truck for lumber yard.............. 170 hoist for filled sacks.............eeeeeeeee 142 hoisting ice into refrigerator................ 347 moving short, heavy, round pieces.......... 519 power shovel saves labor...............+- 398 UE WS GO BE Bcc ccccccconsceneess 337 rear elevating end dump body for coal and GE rakh6 etdbeeekdined6éhcanesusecee 2 self-unloading auto truck ..............0.55 802 tractor for scceplag snow digs and loads dirt 48 Lobsters—colored by my their food.......... 764 Locks and Keys—guard fits inside keyhole to pre- SE: GN Da dcicssaccrcvoveodtas 906 Locomotives Ct. CU SONG Bais ins cccesassccces 518 boy’s dream of ‘“waterless’’ locomotive is SEE ckkka aedawnenetéarnhneceanees 792 electric locomotive as long as three cars.... 784 electricity beats steam in race. !............ 913 Gilley BOGUMASTIWS SBMS... oc ccc ccccsecsces 1041 geared steam turbine engine tested in Eng- ME slaductunesscbeebtencuscescesdedss 1 grooming the iron horse...............e0. high pressure, has greater power largest, sum By electricity. 2... ccccccccccecs power to stop a train twice as much as to BATE cn cecvccccecccccccccccecessccsces 914 single engine hauls train three thousand De LtiGibterkneieet eee bokeh ove eee 887 Locusts African locusts grow large................ 717 oil from locusts lubricates watches.......... 216 London—British parliament houses turn into CE ME an akiebtbewedheeehn ase cde 906 Lost and Found Articles—nightly treasure hunt at hae PE Nivberitwaeveekeeis 573 cams Speak amphying telephone speech................ 349 ae as ncbécccnnaseeee ee without eT CRs sccvecanetans sce 280 Love, Edwin M. Built-in Furniture. .153, 326, 521, 697, 875, 1050 How to make inlaid 4 Aare 670 Well designed radio cabinet... .. viaccess Lubrication cylinder parts lubricated by oiler on manifold 448 ee We MOUND MUR. ss caccsisccseccsnes 871 high pressure auto greaser operates with one BE ccc ce svececcesenescececcoesesers 9 old auto oil reclaimed Sais naw it Wiha lima 114 Lumber and Lumbering Ck 2 a ere rer 170 nine hundred foot log rafts................ 533 redwood log found in sand as good as gold EE Ente bdsivscusneuttoncsearevaseas 717 POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 13

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12 POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 M McCarthy, Daniel—statue of................... 896 McDarment, Corley ee SR A NL So. ac aonie- oa de wlemesiemnea haw 907 I SR ne teen ee dademarevadawdas 33 Machine Shop—machine shop guards........... 336 oe peng SF arg farm labor capacity.......... 625 McKay, Herbert C. Celluloid cou for the home worker. ........ 495 Snapshot statuettes for Christmas gifts 1021 McLoud, Norman C.—Science the modern Sher- SE SR su dckdceweeueetenedewases 729 Magnets giant magnet road sweeper picks up nails and MN. Le bacKi cdr heh eCateeeh ease ceeads ae 710 NN rrr Serr ray eee 349 locating lost rifle pin by means of........... 508 magnet fixed motor on hull turns ship in dock 719 magnetic disk traces metal on workmen.... 275 salvaging submerged tools................+- 492 Magnifying Glasses dentist’s lens for mechanics................ 513 SS Sere or 400 Mail Box automatically signals mail arrival.......... 717 TER WI I gaa tw ds cade arate ae 139 post in pattern of Uncle Sam.............. 359 Mallone, Paul R.—Winter car ailments avoided. .1030 Man—trail of prehistoric man found in rocks.... 539 Mantels DEE ci scecce sanasanses baemar 326 re: SUG SE: ccc caa sev evieceegenun 249 Manual Training boys taught to build boats § ........cccccces 180 job sheet for vocational schools: Se eT ae ES eer ee 348 No. 2, making a set of punches...... 526 shops combine to train apprentices in Mil- REE hctcccetighaoctaneseoresgens we where students are paid for going to school.. 545 Maps coast map aids dry chiefs........ccessecves 384 dashboard map on roller used with one hand 641 electric map made by boys for geography EE csc awckenicneces cdebeabewaeee 470 fe. fC. eS eer 133 serves as guide of Paris................ cow wee special, for aviators aid higher speeds........ 242 windshield map holder..................4. . 329 MEE GRD GE QUNIMIOI so 0 ois ccc cececs onizen 553 Marble best way to scrub, sought in tests.......... 393 ee Ge GP CTI cesses ces ctendeee 600 Marine Life—sponges are hives for shrimps...... 433 Masks fire masks with glass front................ 572 i Pies Sake Kio ae cee aod deans 647 ME EE eon ceucageenc caee ad eeaktewe 925 Matches method of removing and preventing scratch SE a tk tea at wae boanhosa ome dime wake 692 Ns eee ebb ok boda cee eau ean eeone 801 Mattresses—used as boat in waterproof test.... 469 May, Earl Chapin Four millions on permalloy—to win... 947 Getting in tune with ourselves os 779 Measures and Measuring Instruments Atkinson, R. L., the doer of the impossible.. 79 emergency method of finding wire diameter... 160 Meat—thaw frozen meat by electricity.......... 886 Mechanical Drawing ee ee 161 making drawings im wax..............e.0.. 171 Mechanics—three joint connecting rod stop air- EE. enh ywecsn sss cutnawnes 59 Medicine doctor’s pills from hot houses............... 66 pocket pencil iodine holder................ 777 Meerschaum—-cement .......... 0020. e ccc c cues 1035 Memory—saving dollars with knots............. 267 Mental Tests mind keenest at eight a. m. tests show...... 469 mind secrets shown by tests on rats........ 283 mind tests help students to pick careers.... 15 puzzle picture tests police memory and vision 747 576 erry-Go-Round—and swing combined.......... Meta Work—art and utility combined in handi- Sa SE ya a Se 592 Metals—foils rolled so thin they become INGE iis ck iweteeeaeweetecernses 802 Meteorite—giant, given place in Natural History EN. cc sixdrp marae ate Sa St 6 40.68 185 Meteorology oaletns of clouds for weather forecasts...... 803 watching the weather from above.......... 243 senna Gal ef ater Gat... 6 ec siecee evs 11 Mexico—rare birds, beasts and fish found off POD ve farndabsdrNseadscnakna beaten 288 Mice smaller than bees ieee ey ne wel namie aie 285 Microphones—“‘ear’’ detects hum of plane ten miles away GauivnapauanKhaon ben ent ; Microscope—cancer germs seen ‘through camer’... 529 Military Training—artificial hills help keep ee SURE GK. owns ciesvaens oar one 32 Milk bucket support holds pail conveniently...... 686 -tomeanieday cM he wae a, ee ee 392 frozen into blocks for delivery in Alaska. 384 pasteurizing it at home..............e00. ~. 492 Separating CHORM {OM . 6 occiccccccsccccseee 156 sterilizer takes as many as four.......... 988 Miller, J. Earle Nothing built too big to move.............. 979 The modern covered wagon.............. oo mp Unwritten tales of the inland seas.......... 793 Where lightning strikes twice.............. 402 Milling Machinery—protecting the dividing head.. 162 Milwaukee, Wis.—shops combine to train appren- cd pieWd was takandedtinebes + danae 182 Mines and Mining mechanical miner OE casters cvsecvinns 464 Solomon’s gold mine in Peru.............. 768 theater underground for miners............. 648 workers refreshed by salt resist heat of mines. 109 Mirror hall socket does not allow it to fall........ 988 character read by mirror that analyzes face.. 107 glass used in wall mirrors takes two years to WS... cscs waeiivnnes Ceaneake ee ithe 275 ice caves lighted by mirrors for taking movies 89 WOE GS BP Wino cc ci cccavnccoacune 370 Miter—for cutting rafters............... eakbaw 946 Models art gallery modeled in sand............. 637 bridge models for engineers.............. .. 566 Eiffel tower modeled of toothpicks.......... 434 from wax models to "pil ue ee 556 making “drawings” in wax................ 171 model houses of boys grouped in model town 257 a ee eee rere 883 of electric homes ... 0» mike of endless caverns of Virginia in wax.....- 273 of railroad yard signal and switching control. 415 of river steamers built by clerk as hobby.. 113 Prince of Wales carved in butter........ 369 eg eee 564 tell story of transportation................. 721 tiny model of motorcycle with moving parts. 889 toy town home of live pets in children’s WG: kta cuennbdse” Avdou bones enue 100 toys as models aid industry................ 993 yacht model driven by dry batteries........ 182 Monkeys dog team taxi with monkey driver.......... 610 hair of monkey instead of gold for finger NEE | ra ds Wc areca eat tate es data ae 248 Monuments battleship bow forms memorial of battle ER Ee 925 big guns carved in stone honor dead of Great EES S See, FREE ree 889 graves of Canadian heroes marked by light- DONE 2. cuan a eeeaeh ke opened Gries ates 811 Lincoln Highway west end marked by monu- CRE. casssteescew aennnen seed wecesteas 447 of Daniel McCarthy of gold rush fame in SPR ee A 896 “phantom ship’ memorial to whaling industry 887 Tokyo to build memorial to earthquake dead 928 Morocco—desert tribesmen discount science of REE IIE i drab care a kre io 6 ard wee 562 Mortar—keeping it warm.... ......-..cccceeees 1040 Mosquitoes oil soaked sawdust, to kill ...... ......... 617 plant “holy basil’ to combat............... 39 umbrella used to replace smudge pot........ 11 Moths collection of, valued at $10,000............ 201 searchlights used to lure to death.......... 823 Motor Boats—boat race, hundred miles an hour. 361 Motor Busses modern covered wagon, the ................ 219 periscope on bus gives driver view of top.. 368 Motor Trucks dumping body on farm truck.............. 859 emponssom Greek tall BORG. 6 6c sccccccssccces 778 self-unloading auto truck..............sse0% 802 short truck makes sharp turns.............. 685 i le eee 987 Motorcycle cyclist uses men as hurdies..........0....0. 288 14 POPULAR MECHANICS INDEX, VOLUME XLIV, 1925

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POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 Motorcycle: (Continued) making power-driven ice bicycle stunts by police thrill crowds.. er tiny model with moving parts...........--- with front car carries two passengers Motorships—for river traffic Mott, W. P.—How to make nodding doggie Moulton, Robert H. College for fishermen Protecting the nation’s food supply Thrills of mountain climbing lure crowds to peaks in national parks..............-- Mount Everest—sense of taste lost at very high altitudes 7 Mount Logan conquering it trip to top of Mount Ranier—ice caves lighted by mirrors for taking movies Mountain Clim! building a ladder to the sky.. conquering Mount Logan eae ree 4 sense of taste lost at very high altitudes.. trip to top oi Mt. Logan Moving Picture Photography camera and projector Pa in handbag camera cranked by motor in bag corn flakes serve as snow in movies........ dead voters detected by movies............ exploring the bottom of the sea four ton camera takes five thousand pictures a second gyro movie camera gives continuous action. . Moving Picture Projectors—pistol shapec Moving Pictures daylight movies shown in street for workers 2 Soy Ge SOE cj sc ascewescecsrccvasea lions battle film monster shown in cage movies cure ship passengers of seasickness. sent by radio.. world’s most hazardous profession Mowers auto lawn mower has seat for its operator.. cutter bar converts tractor into mower.... electric motor lawn mower mowing lawn banks....... sharpener for, has removable stone Mucilage—label pasting devices................ Music getting in tune _with ourselves eral auth anal ws cunts taught by ~ roll and lettered keyboard. . Musical Instruments how tunes are put into the hurdy gurdy jazz horns sounds like trombone making bugle violin queer harp een to answer need of modern music : Sea ne N Nail Set—job sheet for vocational schools—No. Making a nail set Nails for brick have spiral rib most dangerous implements in industry.... removing from painted work sorter worn by worker Names—of garments traced Napkins—novel rings for Nature—engineering feats of nature Navigation air operated ship sounder. echo sounder shows depth under ship of ships by the ‘ radio lighthouse .... Nebraska—house of corn. is built from school children’s Nesiales—snehk easily made for Needles CO Se AE I 5 ok 645 ood das eecsenane 813 history traced for centuries,................ 801 powdered rosin aids in sewing heavy canvas. 491 Nevada water sold to gold miners at Gilbert three cents a gallon Whipple cave in Nevada New York City radio equipped alarm system town turned into lake as reservoir for city.. upward growth of shown in picture water sweetened with air for purification. . New York (State)—six million dollar Bear Mountain bridge . News container EE ewe cee waved Gaatae Niagara Falls illuminated by billion candlepower old bridge replaced by new at tunnel at, to supplant stairway Nuts—hulling EE Is orn de-cceesavccae 1017 Occupations—how folks earn their living Ocean—exploring the bottom of the sea........ 962 Office A filing box for memoranda foot and hand impressions as paper weights. 669 Se EE EO ise ckespaeseenseanenee letter file for home use tag addresser run by hand Ohio—farms leased in, as game preserves...... Oilcans—spout for large Oils and Fats—oil from locusts. lubricates watches 2 Onyx—South American for Oregon giant meteorite which fell at Willamette, Ore. prisoners of state share profits of flax mill. . Organ (Musical) piano produces organ tones..............5. 751 repairing bellows Ovens—baking, made from tin can Oxygen—portable oxygen tent on cot ysters—hatching in incubators P Pacific Ocean—survey of, sought to enlarge food supply Packing (for shipment) excelsior from waste paper creates new in- dustry five year old packing case Packing ee for high pressure pack- Solving capeheclon Three miles for every meal on wheels —- applying undercoat of enamel brush holder coating galvanized iron before painting.... keeping insects from spotting painting clouds for weather forecasts........ 803 preventing coal tar stains on paint 701 staining and painting laths................ 493 SR: Scns ubs akeneeo te ca rduhess ous bane 696 Paints acts as thermometer by changing color add water glass to paint to hasten drying.. determining whiteness of lead paint flat oil water paint how to clean floors before refinishing “ivory-plated” autos retain beauty of finish.. 442 newly mixed allowed to stand before using. "1020 sand blast removes varnish for interior decorating sun replaced by electricity to preserve paint- ings to paint Paleontology bones of twenty-five ton monster put museum footprints of dinosaur found on rock thirty feet deep “world apart’ yields giant bones Palestine—lost Bible city of Capernaum uncov- Pans cake pan has open spring sides............ lid fits different sizes Paper carpets woven of paper yarn easy way to tie sheets of paper together. . excelsior from waste paper creates new in- dustry loud speaker made from paper cone wrapping, from peat Paper Money better oo worn gold 1000 durable dollar bill sought gasoline men cause famine of dollar bills.... 81 Paper Weights—unusual amen "ape jumpers race from single oon Paraffin—disk for removing, from jelly containers 639 Parasols—vanity box in 5 Parker, H. H.—Surface grinding in the lathes... . POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 15

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14 Parker, Leo T.—Don’t throw away your ideas.. 745 Patents growth of patent office..............c0cees 37 sale of models clears way for new inventions.. 368 EE. ves cukinind Gh waem manele ee sate 726 Pearl, James W.--A comfortable uotdoor sleep- Br SEE aickansdesenceseutanerncsedagns 1015 Pearls clams as pearl incubators...........ccsece . 65 i Pe cvdnceneh eens. dxineseeawaaws 13 eT i ee.) eee ee 533 pearl sorters wear blinders to help in color |: Svrrrerremrrerrrerrerrerrererir ere. romance and dangers of.pearl fishers in Aus- SD: pgedcdattecenndeesecancenedewad 412 Peas—shelling peas and beans...............44. 501 Peat—wrapping paper from..... .......seee0e% 215 Pencils carries five leads of different colors........ 905 machine sells lead pencils with buyer’s name SE Li enta i adiebow hoa wits acy ee Penknife—revolving eraser serves also as..--+-<- 360 Pen—drafting pen filled with one hand......... 383 Perambulator—baby carriage that folds up for auto 784 Perfumes—trare, made as centuries ago........... 394 Periscope—on bus gives view of top deck........ 368 Permalloy—four millions on Permalloy—to win 947 Peru—Solomon’s gold mine in Peru........... 76 Pests African locusts grow large............... 717 burrow trap for farms easily made... ...... 1036 destroying caterpillars on grape vines...... 665 errr ere 500 Of ree ar os aoe es SO DE GUNG s occ icccewencsasace 17 sf eer ere 509 grasshoppers found 18,000 feet above Earth’s DE: ewes svcnseneceegensceegeaerses 365 installing “‘invisible door” to keep out... ... 514 lady bugs war on orchard pests............ 544 eS eS EF rere 447 plague of caterpillars laid to bird feeding.... 707 plant (holy basil) to combat mosquitoes... 39 poison gas routs black ants from nests..... 968 sawdust oil soaked to kill mosquitoes........ 617 searchlights used to lure moths to death.. 823 GEMNGES DUG CROSET. 6... csr cccecccccccseccos 675 trapping orchard insects................4.- 338 Petroleum drilling of deep oil wells taxes skill of ID iinren nda. he Wea gare Ge +o areee 414 electric heater reopens clogged oil wells... 274 oil well digs own grave..............ece00e 648 oil well leaks found with “water witch’’..... 282 Philadelphia, Pa.—glories of old Jerusalem at ex- DE - cagciveigdacebedrereees é0nel 742 Phones—midget phones for the deaf fit without EE heirteulh 6.8640 ahah eiw Waxed eee Phonographs extension shelf on cabinet... ............. 315 discarded needles used as ‘glazier points..... 682 PM shtiwc tthe te oakeecesc ane dteace sais 137 radio tubes in, produce better tenes........ 894 Photography ; rae Camera serves as sextant im aviation... ..... 40 camera traps auto spéeders..........0...... 954 cancer germs seen through camera........ 529 century of photographic art observed in I che cuit CES 6d ats en hed ¥6.0%aN 360 diffusing screen for enlarging lantern...... 142 film for type used in printing process...... 727 getting better photos of children............ 138 intensifying or reducing negatives with one Pt pe nGhawinh kb cnn iragended es 674 lino-fronted easel for..............0ececeee 667 photo taken in stomach................... 201 photos done in seven minutes on speeding DE cievebedin awh bees ve xes 0d © ews pictures by long distance telephone sit eacaedaes pocket lamp used as “gun” for fashiight | PROLOS 2. nce eecssccccccsscccccescccees 392 progress in photography shown by army stunts 201 taken through glass to study golf stroke..... 800 sna ~~ by pg omee eS ea 61 ography—A atus and Supplies borders for fair tones...... is 164 y— Developing—film developing tank PT SL dkah Gate dawk ees ase beens ee Photography—Printin drier ives two thousand an hour.......... 450 frame for drying plates.................... 494 holding back shadows when printing....... 316 printing masks made of cut film............ 508 —character read by mirror that ana- kf ere ‘a does your face reveal your character?..... « 897 POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 Piano finger exerciser for pianists................. 357 pianist weights wrists to strengthen hands.. 617 pressure, signs and movements of pianists.... 789 produces organ tones by means of reflectors 751 Pictures TO Re eee ee ee 816 lighted color rolls tell stories for children... 541 Pigeons lofts installed in California................. 811 ten thousand race over hundred miles....... 905 Pile Drivers—excavating machine used as........ 874 Pillows—air filled cushion headrest.............. 564 Pins cushion that straps on wrist............... 989 , tame Of, IMCTEADES. .... 2. cescccccccccccccccs - 266 ii bending pipe with fire..............ccc0ce. 1020 built of wooden staves...........ccceccees 593 Cutting, Ot ANBIEB.....cccccccccccccccccese 685 repairing holes in water pipes.............. 158 triangle-shaped drain pipe folds flat........ 434 Pipes (Tobacco) cover on pipe for motorists adjustable to wind 98 5 folding pipe fits vest pocket.............. hundred pounds of briar for one pipe......... 601 laurel rivals brier for pipes............... 65 Pittsburgh, Pa.—-collection of moths at Carnegie PEER kiddie kesieticiecance aa keane Planers index pin aids planer work................. 345 sliding grip holds boards to plane......... 282 Machine extension tool on small planer.............. 870 a cs» aki wnen ethene cated aebaeacelion 139 Plants cannibal plant eats itself................. . 806 Holy Basil to combat waenereen icteneowees 39 seed shot from plants...................... 465 SE NE OE In ddaercecsrbidusccwseae 14 oe | a eee -- 207 Plaster—repairing cracks in plaster walls........ :1027 Plating—rust alloy for plating gives hard surface 294 ws, ditch scraping plow cleans gutters......... 886 one cylinder motor plow replaces four horses 107 Se ae —methods of cleaning a sink.......... 663 ining that fits inside of pocket......... 813 Peisons—ty Papers and poisons................. 137 at White House must be six feet tall........ 77 motorcycle stunts thrill crowd............ 750 puzzle picture tests police memory and vision 749 six wheeled bus for riots................00. 634 trammimg police WOrses. .... 6. ccccccccscoses 237 white sleeves assist in giving traffic signals 25 Polish ED TG ick ahi cnntesnennsenee 149 prohibition changes method of polishing jew- MI: chicas Git ete chcsininign 5udabicn ae Sch es ee ene 999 stove polish TR CUBER. ccescccccveccccsocse 813 Politics—kings still in power................5-. 764 Popcorn—sheet iron sheller..................4.. 843 Population—farm population declines........... 609 a Aine planes soak up water....... 98 Porpoise—seen as leather source................. $72 Postal Service dead letter mysteries solved............... 535 ee Rrra ere re 139 letters sent by skyrockets between ocean islands ....... Reh ah ape mn ee Ree 365 mail box automatically signals arrival of mail 717 nine thousand new flags used by, each year 77 omitting mail bag stripes saves thousands of CD 520s cd dnnnsnseacanad edn k ee bine 271 Oe ee FOG Bi i hinds crenscnsceas 960 rural mail carriers work..............2.e065 180 Posts—driving in fence.........0...ccceeeeees 325 Posters—moving sign on highway..... ......... 841 Potatoes i I iia ci sh ie tabs hasan cle anil dy teehee hee eel 1000 masher that can be taken apart............. 989 FE SP Re At Re Pee ae 884 Poultry Ne ee en er ee 969 baby chick clinic on trains high Whew en Oe ON SN 460 chicken and egg crop of U. S............. «. 544 COOMF GURMOE MEN. occ cc ccccccccccccccccs 677 SS Se. eer 873 hens scared by airplanes refuse to lay...... 946 hook for suspending fowl.................. 693 turning eggs in incubator.................. 171 Power luxuries for all, gift of power............... 366 steam drawn from wells to drive dynamos.... 461 triple farm labor capacity with machinery.... 625

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=wo™N ~ or Vm ww re Ve aS naw 2o2c""™ SN eS eee — ww No i Rede. a) ~~ www we ew ew a] ~ SS es ~~ ewe ae — awe aN eee YY ft 5 l 5 wer Plant ” electric lift plant runs itself..............+.-- 119 horse wer for each person equals forty-eight BOE 6a sScueEeewhdcbsaseussuhencese ous Stones Precious, emeralds mined in Columbia.......... 574 onyx from South America..............++. 215 Press—printing press for the home run by hand 114 Pressure—water harder than steel.............++ 573 Printin, built up printer’s chase.........seeseeseeers 866 film for type used in print process........... 727 liner gauge for typesetters...........+++++ 89 making printers’ type and rule............ 174 Prisons prisoners share profits of flax mill......... 593 seen from air looks like huge wheel......... 810 Prohibition changes method of polishing jewelry......... 999 coast map aids dry chiefs..............+-. 384 Pr lers Se propeller Gt GER... ccccccccccccere 411 for boat or — act as rudders............ 88 suter, G68 QUNMB, cccccosecscccecceccncenesss 229 Pullman Cars—seat as dressing table in Pullman COE 0666456 4660046640654 085600 026 eR eKeO 272 Pumps P : ‘ boat pump purifies om with chemical solu- GOD csccdcasdestadseedsrdesneterecnes fire pump run by auto wheel.......... ea ee force pump raises. city water.......... ee high head pumps drain cofferdams........... 1049 making boat bailing pump................. 324 making old pump sanitary................. 1029 sovel WE Ch sa deetescsvacdtonsceess 312 old windmill rigged up to run field pump..... 871 gronl SONNNTE TNs t6h.6escdntawesacceua 968 removing pump valve seats................ 335 swamps in Iikinois converted into field by CGE: WE axe inc: tee n48hh06i09 0840 o2 underground pumps to save St. Paul's cathe- GE pc dncetexarunvies cant baredeccesess 897 Punches—making a set of punches.............. 526 Purse—rubber purse for bathers fits on wrist.... 737 Push Car—with seat folds for carrying......... 366 Puzzles—picture puzzles in coin book teach chil- Gh Gb aks m0 8 dssecckusesencnesens Quenching—heated tools...........c.scececeees 160 R Racks for neckties easily made.................. 1028 newspaper rack for walls........cscccceses 54 sedan hat rack made from springs.......... 158 Radio aid to government in economy campaign. 53 birds spoil radio reception with nest in fuse DE Lmiehindavepcakenesesews ’acdudeen 449 blimp’s loss laid to radio..............2+4. 216 Carries VOICES OVEF OCeAN........-. essence 709 progress in radio and flying shown by army CONNEE. tan-n085 senrvenraseeunsstvesacees 2 radio on fast train has headset at every seat 235 scrambling radio waves to beat static...... 5 taxi riding a la mode:..........cccccscccees 303 ten million receivers predicted in five years ee OE rere re VO WP Gee Is cv ecdindoeneenvee ce 705 what you want to know about radio........ 175 word “kilocycle” replacing “ 1 &”... 303 Radio A y placing “wave lengt ae ee rere 649 erecting single wire aerial on flat roof....... 834 insulated wire used a8... .....cscccccesccess 485 simple method of building large aerial..... 1004 thrills in life of men who build radio towers 790 Radio Antennae—hid in lamp shade............. 73 Radio Apparatus automobile radiator makes good ground..... 653 battery cable eliminates binding posts....... 1013 condenser suits any circuit................ 827 Radio tus efficient lightning switch.................. 124 extra string protects the cord tips........... 297 finishing COURS GUNG. ces cccaeccccccens 307 BOR NN Rtn on cutlsweade-cveeccens 2 fixed condenser aids in obtaining sharp tuning ose fixing condenser for experiments........... UE EN I Ce lace ciedindke ceetnawae b62 homemade directional loop has remote control 308 POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 15 Radio Apparatus: (Continued) improvements in fixed condensers........... 1008 lead in kept from grounding by bracket in- EEE Waris 2 bbsdsea vers aad eenanescéiaes 833 lock switch protects batteries from use...... 833 logging dial aids in locating stations....... 129 logging plate behind dial makes tuning easy.1004 map on loop aerials hides the wires....... 133 metallic Da fF eee 133 new condenser spaces stations evenly....... 486 CE Cir cnt co debedessicvacenecvieneases 303 radio dial setting record opens like fan..... 95 radio engraving machine works from light CE ¢ chdsnenecesscegianiensssdevnse 1 radio switch saves testing to see if set is on 216 shock proof plug locks cord tips............ 835 small jack aids efficiency and saves space. 484 socket equipped with ball grip for tube CEE is 66946 60 ceeneehs44eeeaneaee 1014 spring post makes quick connections........ 134 switching battery from set to charger....... 835 CO ee GE GE acc cndscaccevevcceces 302 tool chest made from cash box............. 658 wood hinge on cabinet aids efficiency....... 125 Radio Application esperanto taught by radio................. 106 fountain controlled by radio............... 985 installed on to coax child to sleep...... 393 making use of radio in business........... 815 moving pictures sent by radio.............. 409 radio equipped lifeboats to reduce toll at sea 426 radio Lighthouse with revolving aerial warns GRIPS oor ccccccscccsecccvccccsccccccece 884 radio signa] alarm system...........e.see8% 441 sound waves from the brain picked up by radio 784 wireless phones on trains...........es.00. 776 Radio Battery ammonia water first aid application for eS! — eee 1009 automatic battery connector............e.0% 838 battery has built in visible hydrometer..... 125 B-eliminator for eight tube set............ 302 how to avoid making mistakes when wiring Ce Mn 60 6 hase th enssceneresdaincees 3 Se. GO A IR ook x cwcctagaecenes 1010 keep out of sunlight and in cool place........ 1014 lock switch protects batteries from use..... 833 Radio Broadcasting better radio ~ & by double broadcasting... .. 293 insulators bigger than man............... 544 new transmitter for radio to reduce sending CORR ccc cccccscccscesecscescoessosece radio programs bottled for future broadcasting 208 small bells imitate chimes in radio broad- GEE, b:e4 be pkcean tbe véwivdssccoccscast 181 two foot radio transmitter................. 105 underground, heard across country......... 202 world’s radio roof held cause of fading...... 811 Radio Construction adjusting tuned plate circuits.............. 834 x aids in soldering radio wiring........... 134 busbar wire contains own solder............ 835 by-pass condenser for noisy B-batteries..... 1009 clean jacks improve reception.............. 835 condenser improves quality of reception...... 653 eliminating hand capacity.................. 653 fixing condenser for experiments........... 134 good rheostats necessary for best reception. ..1014 increasing volume on high wave lengths. ...1009 jig for drilling for switch points............ 662 knockdown cabinet readily assembled by ama- Me Sbdwetendcesachanes o0onbe000048 bes 134 low loss instrument for short and long wave 655 markers prevent mixing radio wires....... 1008 potentials vacuum tubes should be operated on 833 renewing panel markings.................. 297 rubber band makes good phone connector. ..1008 self aligning bearings for “a coil builders 485 spacing wire on coils...... ; - 833 Se Dea Gbdces nabeceasuwrecas Teen kheie 486 trouble shooting in eight tube superheterodyne DE siNchde bkatahd kkeeho vbewsceen en 130 well designed radio cabinet................. 1001 wired unit saves builder’s time.............. 485 workbench for radio fan...............0006- 651 Radio Crystal inexpensive CD ei vs kaka ddeneeee 836 rp 2 crystals at ROMe........0.ccccsces 303 or receiving wireless signals on ships 432 Radio Loops how to make tapped collapsible loop........ 825 how to select and use them............... 659 Radio Loud Speakers building loud speaker in standard cabinet... 652 felt diaphragm modulates tones............ 658 made from Paper COME........ccccccccscces 125 Oe Eat rt 5d cb bssaS veadnuccvoanenn 485

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16 Radio Phones ey OE. 6 ons ddd ba eked hoes 308 SE I civic cdc vasencveanencds see eis 653 rubber band makes good phone connector.... Radio Photography living pictures sent by radio without film..... 236 radio photo sent five thousand miles....... 1 Radio Questions and Answers—what you want to MO GOED COs oc vic dcceccezerwven cee 1OCEbS CHKES EO OS 175, 352, 528, 704, 880, 1056 Radio Receivers alternating current tube receiver........... 1005 OE Ser Pe ree 224 clock turns receiver on and off.............. 1014 for motorist fits auto instrument board. 14 BO POs oo Soc ececeecass cours oeenen eee 121 four tube loop receiver..........-ceceseceee 299 getting the most out of the radio set in ee EE Re See Peer See ey Tre re 304 low loss instrument for short and long waves 655 nine tube superhet..........cssseesessecees 47 POTUOCS CONG DIK. oc cccsscccccvvesesenseece 829 shelf mounted reflex receiver.............. 307 six tube self contained loop set has coast to Se Ce a pcadeh chek eee eA heme 127 three-tube ultra- audion eee ee ‘3 475 Radio Tubes in phonograph produce better tones........ 894 new tube works from light socket........... 55 repair that saves tube with loose base...... 833 tubes that won’t burn out................5. 92 Radium—world’s supply of radium less than half ES cra cueate athaansos ahha wend ahs 95 Railroad Construction—motor driven track shifter 642 Railroad Stations—sixty million dollar depot to er ee eee re 608 Railroads automatic box car dumpers..........-...+-- 88 Gentes Bees Troms COs. .06scccccescccsces 96 greatest rail hazard ended by automatic PE. ncachededasnewatns eee bes- es 752 making car ride smoother by rail joint tests 107 model of railroad yard signal and switching SE oi shs06 Codec nntursns SeRReee eee 415 Weber Grrven TAWA CAP. 20 ccccvccesescves 939 Railroads—U. S. A. autos and roads worth as much as railroads 47 autos furnished 2,000,000 carloads to railroads 282 names for freight trains to replace numbers 120 rubber tired tractors pull city freight trains. 281 Rain acc ae i adeknceee ne one wilne 11 size of raindrops recorded for scientific study 190 Rats carnations as substitute for cheese as bait CME. dog places signal lanterns.................. 185 extension truck tail light.................6- 778 fiber helmet under cap for jockeys........... 898 flange on rubber cutting template........... 1053 goggles for onion peeling ere ere 944 guard on saw prevents “kick back”’......... 701 higher speeds on good roads urged......... 574 holder for shop goggles.................6. 72 humps in road give warning at crossing.... 806 increasing safety of freight elevators........ 1054 light houses warn autoists...............0- 217 lock on gas cock prevents accidental opening 77 SE SD. SN Fin 5k ccc dess ches ee ce 336 making baby walker safer.................. 143 ft Lf ee neat 925 net guards bridge workers from falls........ 727 ridding manholes of gas.........cccccccccce 702 rope support for horseman................. 925 safety guard on power switch............... 161 sliding sled on fire ladder.................. 719 tail lamp for saddle ianees Se, WED, oer 625 toy auto serves as warning to prevent col- NR eae Peery Be 8, Free 190 trafic and street lights combined for safety 285 white crosses are warning spots at auto death 2 EPI 8 ER BAPE ree 790 wire masks protect girls in factories......... 585 wire netting over manhole...............+-. 294 Sailors—form human tree on ship’ s yard arms. 801 St. Louis, Mo.—skyscraper built in terraces..... 448 — service radio store.......... 74 t beds a_ thousand feet Gs tdivaiew deanna ae 531 brine from ice cfeam tanks damages street paving Se er eT EE ee ee ne 922 mountain of, mile wide in Algeria........... 253 workers refeshed by salt resist t heat of mines 109

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== ee wa ow a eS So a ~~ ee oe oe ate Oe ae VS ON SENN OS Se eee eee ee ‘Sw -fAe ew 1 md eed POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 Salva e—robbing Davy Jones’ locker............ 435 rancisco. - ( ‘hinatown lighted with pagoda shaped lamps = jeweled arch at San Francisco monument “Three Shades” marks Lincoln highway ... 447 Sand—art gallery modeled in sand. 637 Sandblast electric sander is portable 648 removes varnish 59 Sanitation—boat pump purifies pools with chem- ical solution 366 aving and Savi . dime bank fits vest pocket like fountain pen 616 omitting mail bag stripes saves money picture puzzles in coin book teach children — thrift saving dollars with knots...........0-e00005 Saws and Sawing Rigs automatic saw filer is run by hand or motor chain saw driven by motor compressed-air saws. guard prevents ‘ *kick “back” on saw one man portable rail saw portable saw, electrically driven sawbuck holds cordw immovable sawing trees single hand swinging saw cuts ice using log saw properly.. Scaffolds raised by foot and _— adjusted steel brackets for. Scales—for clubs and * rackets show weight Science how science is transforming industry martyrs modern Sherlock Holmes. Me a ee eee ee Scooter combined scooter bicycle for sidewalks..... run by air power has speed control Screen—tool tacks and stretches screens........ Screwdriver for difficult situations has jaws for slot.... grip on blade holds nuts in place Screws loosening tight covers storing small screws, bolts and nuts......... tampering prevented by filling slot Scribing Shafts ° Scupture art of begetable sculptor statues carved from billiard balls........... Sea—neptune’s drug store Searchlights batteries of, to repel air attacks............ giant, visible over two hundred miles....... used to lure moths to death Seat cheap and novel hall seat coil spring on tractor improvised porch seat making woven chair seats............e+-02. Seaweed—food of Japan Seeds—shot from plants.. ‘ Seesaws—folding, amuses children indoors....... Selenium—element sensitive to light fireproofs wires 229 Senses—of taste lost at very high altitudes..... 790 Sewage Plant—measuring sewage flow Sewing Kits neat thread cabinet pin cushion can be worn on wrist Sewing Machines—rank first as farm convenience 912 Shades—painting old window Sharpener automatic saw filer run by hand or motor 47 blade sharpener on harrow 460 egg and cream beater attached to emery wheel gearing for lawn mower has renewable stone knife scourer and sharpener in one making a stropping wheel CC CU Gs ee Ro ne secnede ec osevavns 286 rotary, grooved, grinder Shaving—shelf for lavatory. . stencil guide for neck shave Shaving Brush has mirror and razor in handle suction grip for, clings to any surface Sheep—clean up lumber yard.... Sees and power sheep clippers Sheet Metal—cutting heav Shellac teal handling shellac brushes how to bleach Shells—turning fossil graveyards into wealth. “Shenandoah"’"—what happened to ae, Fenn—To make your work easier i carries half of self through canal changing propeller at sea corrugated sides of ships to prevent ym si fire ends career of useless war-time fleet. magnet fixed motor on hull turns ship i dock phantom “ship” dustry sailing ship queen of salmon trade sailors from human tree on ship's yard arms MUR irarw'o w'e'4G4- cw eck ik 0b edb Gbigwe cee Shipwrecks artificial tide from ships dislodges boat radio equipped lifeboats............... Shocks—corn shock tightener — aid gravity sand Signa a mail signal invisible light signals to fool foes in air Signs and Signboards—shields to mark all roads 7 Silverware—cleaning tarnished Sink—methods of cleaning Skyscra ee NON 55a cca cin wak bone xd Be eden ae of future skyscraper fifteen hundred eet hotel above office building Sleds brakes fixed to runners prevent coasting acci- ents sliding sled on fire ladder aids rescue Sleep—-weight lost in sleep recorded by scale. Sleeves—rubber sleeve protectors............... Slot Machines for stationery Smoke detected by electric gauge screen used to aid bootleggers’ sky Smoke Nuisance —— in eye inspires inventions 5 Smokers’ Stands, et ash tray with “liting tube fishing can for live bait, tackle and cigars... spring top for tobacco pouch Snails enamel produced by, withstands live, stored for winter use Snakes bites result in 400 deaths in U. S. A. ES ee ee ne cargo of rare snakes for New York City zoo old snake yarns refuted Snow, + A.—Herald Island is claimed by ED... it Snowshoes—for horses 3 for horses, round shaped Soap ingredients of early soap shaving, for washing machine Soils—tilling Solder and Soldering aluminum flux handy box aids in good work heating small soldering coppers making soldering iron heater on iron and steel preventing solder from spreading rest useful in soldering soldering flux for iron and steel soldering large sheet metal tanks........... 1042 swivel end soldering iron Solomon, King—glories of old Jerusalem at Phila- delphia exposition Sound echo sounder shows depth under ship hotel above office building does away with noise recorded for future on disks of brass sound waves from the brain picked up by radio 7 South America—brave jungle death to map South American plateau Spark Plugs cleaning flash reflecting, shows missing cylinders.... Spectacles eyeglasses resist gun fire glasses with blue lenses show natural colors.

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18 POPULAR MECHANICS INDEX, VOLUME XLIV, 1925

Speed boat racing at a hundred miles an hour...... 361 camera traps auto speeders................. 954 . higher speeds on good _ urged......... ons ponges—are sea beehives for shrimps.......... 4 } elle to hang spoon on Sporte—winter sports...........cccccceseeceees 29 Sprayers—catching drip on spraying rods...... 513 Springs (Mechanism) BUREMIME OCTEEN GOOF ...c. cccccccacscvsesece 316 made from magnet wire..............0..+ 339 master leaf on auto springs................ 293 Sprinkler—guard for...........cccececeeceeees - 500 Stage Mechanism curtain represents picture frame........... 275 theater orchestra raised on electric elevator 285 Staining—walnut stain for cypress..............++ 685 Stains cheap mahogany stain...........eeeeeeeeee 1048 removing, caus by fire.....s.ccceccveres 686 removing sugar stains from clothes......... 842 to prevent coal tar stains on paint......... 701 Stairs—marking stairway stringers.............. 515 Standish, Miles—statue of, struck by lightning ‘mended by steeple jacks..............+. 776 ante —cocmving blue print stands............ 337 Staples—holder for driving staples.............. 518 Starr, C. H.—Making a soldering iron heater.... 683 Stationery—slot vendor for...........seee-e005 785 Statues carved from billiard balls...............-00+ 208 freedom’s torch kept bright by floodlights... 450 struck by lightning mended by steeple jacks 776 “Tom Sawyer” and “Huck Finn” in statue... 460 Statuettes—snap shot statuettes for Christmas MOU 65:60 69060006550000s0R0000s0c+0008 1021 Steam é ; beaten by electricity in railway train race... 913 drawn from wells to drive dynamos........ 461 Steam Boilers finding boiler efficiency.............2e.see05 694 old boiler used as compressed air tank..... 694 Steamships : cost "he operate steamer ‘“‘Maijestic”........ 636 wax models to giant liners...............45 556 Steel hardening carbon steel tools.............04. 163 history of steel traced... ..csccccccccsccce 585 persons employed in and production of steel Se eee ere salvaging submerged tools by means of a in tempering small steel instruments.......... 350 Stencil lye Jipbahee hands decries iedonenan eee 602 addresser run by hand...........-csecce 229 Step— igh switch reached by swinging step..... 1041 Sterling, H aking a three tube ultra audion 475 Stile—auto stile over farmeér’s fence............. 1054 Storage Batteries—repairing cracked rubber bat- tery jars ulate Dida th Sicha Ob 6-060 4-0 a 6 wae lhe 1 Sy wire brush for cleaning............ 1019 Strainer—for teapot, can be removed............ 989 Street Cleaning—giant magnet road sweeper picks eG OS bos ben se so odes das kore 7 Street Lighting pagoda shaped lamps in Chinatown......... 976 traffic and street lights combined............ 285 Street Railroads gasoline driven street car tested in New York 16 shower bath for street cars keeps windows Pl ene tGeSiGee aed os <cheee sauce se'e 401 vestibuled street car train.................. 544 Street Traffic lations auto signal winks its warning. ........ 766 auto stop sign of prism glass.............. 768 flashing hands halt autos.................. 761 guide lines direct traffic.................... 893 raised walks in busy square................ 289 spikes as traffic line marks............... 37 street names fastened to curb.............. 883 triple crossing at San Diego, Calif.......... 585 white sleeves assist police in giving traffic er Sy a oe are een Strops—safety razor blade stropper rolls in hand 961 Study and Teachi electric map made by boys for study of . 470 coperante taught by radio.............,..... 106 music taught by piano rod and lettered key- realistic method of studying geography..... 150 revolving stage for art students........... ea a aa ae... oe Subways—new methods speed subway building... 425

Success—oldest child most apt to prove successful 6 Suction Grip—shaving brush suction grip —_ 00 GRY GUBEROE. 2. ccc ccccccceccccase - 802 Suffrage—movies detect dead “‘voters”......... 586 Sugar—removing sugar stains from clothes...... 842 Suitcases De. CO Mai aa a cirtopacestancnsoad 585 ES eee 858 Sun NE ian tial patients Atma hs ou ako ian 587 heat sought as herald of cyclones and ee SRS Ee Ee ii 20 midnight sun mer arog ie cia dc sae ar aek ce 707 replaced by e —— to preserve paintings 271 SOE GD WINN Me cccticscectacnecanwad 393 weighing a Any Sp ee re pa 555 Sundial—-with several faces tells * world time.... 47

Sunflower—diet for cattle.................

Superstition—afraid of their shadows........... 208 Surfriding—surfboard riding on land............ Surveying—rivers sought by airplanes to fill dried Wl Ge es dnbe stews secnniecedcuaed 954 Sweden—water driven railway car.............. Swimming—channel crossed five times beats most DONE. Savesecscnetssctenchseserees 783 Swine Mecties baw Mis a inc scsieivessescceccess 348 pigs grazed in cork forests to aid tree growth 81 8 EE errr ae 1042 Swing—safety device on baby swing............. 676 Tables adjustable kitchen work table............... 843 car seats made into table by frame supports 586 combined bookcase and drawing table...... 865 extension table for kitchen has no leaves.... 960 flat iron bench supports..............0+0- 173 Ce Sb SN Mik bn ae eanncnass ces 61 folding, fits the lap for reading or writing. 365 hinged top doubling capacity............... 638 making a small study table a PRE Ae re revolving stage for art students........... 330 Tanks ee 139 MOM-CRPOSIVE GE. oo occ ccicccreseccecsees 741 stopping leak in wooden water tanks......... 493 Tapestry—expert at restoring old laces and tapestry 407 Fe pping holes in small steel rod........... 701 eS Se Seen 31 electric, tells where bullets hit............. 280 “firing” on toy battlefield cures “‘buck fever’’ 265 Taste—sense lost at very high altitudes........ 790 Tate, James Chipping chisels: how to use them......... 340 SE OE eee rn eee 844 Tools for the home mechanic............... 144 Tea caddy that measures out tea............... 286 from South America for U. S............. 249 Telegraphy—four millions on permalloy.......... 947 Telephones amplifying telephone speech............... 349 bracket on coin CU subtsebdena cceecobeoes 459 as. of rrr er ee. 416 fomgest phome CABEC. 6. icccccccccescccceces 816 meter checks calls on automatic phone.... 78 phone girls of many lands.................. 434 pictures by long-distance telephone......... 187 queer phone problems met................. 531 rubber base for telephone.................. 616 secrecy on party line phone............... 288 X-ray picture by telephone................. 61 Temperature paint by changing color acts as thermometer 202 trees affect temperature. .......cccecsccece 368 Tempering—small steel instruments............. 350 Template—flange on rubber cutting template... .. 1053 scales i clubs and rackets show leverage OF Se? ae ie Sea tennis a golf balls tested on motor driven aris deena deweeabeks 620keaah Se Tents comfortable outdoor sleeping tent.......... 1015 portable tent like dress for bathers.......... 192 Testing Se a oivs060pd die One d 00s s ne becom 241 best way to scrub marble................4. 393 color of hay to determine quality........... 229 color tester for fabrics determines durability 119 electricity to test — Ln eteah Rea Te 2 for slippery floors. . . fp JS Be eee. SE: ee MUNN Sands 4sctieccecs sececanes

Page 19

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Continued) Totes: © car ride smoother by rail joint tests af meter tests rise SPAMB. 2. cccccvwsccseccas tennis and golf balls tested on motor driven DOSNT oc cccuvacsecdvervcoscoccstinecce 254 Texas—cold air from well runs pumps and en- GIES oc ccccccssvvcsccccscccssvosceses 737 Textiles carpet from string beans............+00+0+5 728 color tester determines durability.......... 119 Theater—under earth for miners.............++ 648 Thermostat—for auto motor...............+-++ 555 Tickets—resale of pass-out checks stopped by CUT DUI 6.6.0 65 oot nednec0485 905580 399 Time—sundial with several faces tells world time 47 Tin—Alaska produces most in U. S. A.......-. 461 Tin Foil—pictures in colored............6.+0+6+ 816 Tires air meter on hose ‘is set at exact tire pressure 184 aie ocala Ger B6tO GEBs csc cc cccsccccsscece 751 claw links for tire chains.................. 375 cover for spare tire will pay for itself...... 499 inner tube of three layers..............4-+ 824 inner tube runs toy engine...........+..+- 1028 loom for weaving tire cord placed in museum 600 made to roll farther by chemical research.... 37 old casings make unloading mat............. 869 self-mending auto tire............0.eeeeee. 434 soapstone sack for dusting tires........... 512 spare-tire rack with spring saves lifting on OE Milakbd os dakaeeeesdb caren nsneaeres 59 cock Gat GRRE GBiiciccccceccceszeccce 693 tool of great leverage fits all split rims.... 789 Toasters folds up when not in use..........-2scee08 287 sandwich toaster in cabinet uses electric lamp EE a eS ee ee re Toboggans—foot toboggans for winter sport...... 946 Tokyo, Japan—to build memorial to earthquake EE: SAS ctes Cemipe cae een idnse sees 48 928 Tonga Islands—letters sent by skyrockets....... 365 Tool Box back seat tool box for automobile.......... 508 NG cc bbasane en nebdwadees ateees 658 handy garage tool carrier..............6-50: 315 Tools five in one for radio construction........... 662 for the home mechanic.................+.. 144 full work shop in a novel lathe............. 616 hammer changed to hatchet............... 586 how to use chipping chisels................ 340 screen tacker and stretcher..............0. 630 Oak OE CRN GIES DE Pick stadia cccrcsccee 810 Toothbrushes ae hee ar 812 run by motor have detachable handle........ 469 Torches—-to heat engine wheels removes tires GU bs ashen ctr saebhanseveerde ee ame Tornadoes ninety-four in United States every year..... 78 sun’s heat sought as herald of cyclones and CGE: dtivataunche Kativduubhcwts. «060s 120 Totem Pole—carved for Indians in Arkansas.... 969 Toys 2 A: BO SRI os eniintecacetiaceor 993 building blocks like books................ 561 children build houses with wooden blocks. 767 inner tube inflated runs toy engines........ “1028 motor driven building toys................ 710 nodding doggie, how to make.............. 678 sealing wax from dry cells used to repair A PS EES: re PR eee 10 wind propelled toy wagon................. 667 Track giant revolving track for the bull wheel..... 873 motor driven track shifter................. 642 Tractors oe 107 rubber tired, pull city freight trains........ 281 OREN: We SEN We. ck acdaccctessacce 48 Transportation Se ee A Ms cick besan deny ee modern covered wagon...........0...000% 219 oil engine for river traffic.................. 561 CE SII Gi a Sesiewivesccvcscaes 626 Traps and Trapping ° eanaie aprile... th, TREE CC TOT eT TTT ETS 1036 RE iin edu esata Bi wicked nero ose vin 143 en |. eee 648 rays—convenient draftsman’s tray.............. 161 Treadmill—walking race on..............eeee005 629 Treasure-trove nightly treasure hunt at bathing beach..... 573 mystery of pirate’s treasure still unsolved... 720

POPULAR MECHANICS INDEX, VOLUME XLIV, 1925 19 Trees en: Gs odo 6.0.6 hia 000 ene 508055080 368 forest planted like wheat............-50500. 251 freak canes grow on trees by twisting MEE Sinewhavebenedsnedadesecssesn 3 how many leaves has a tree...........0.+5 105 pigs grazed in cork forests to aid tree growth 81 planted with cannon on steep cliff.......... 470 DEE SN she teede eee bGheve chins roooruees 138 sap ee ee NIN, an dc caeendcaccecnden 189 hes aa cottonwoods prevented by acid ‘ Trucks—for , = Pe can ashstnnbeheseeeeen ee 170 —s death behind dynamite in construc- 397 half villion bags of cement used in lining Comment ed... cccccsccscecccves man made hurricane to free tunnels of gas.... 554 new method speed subway building........ 425 Turbines an steam turbine engine tested in Eng- OS EERO REPT SP REET Sie ere portable air mo* ~ runs cleaning brush...... 280 Turning Machinery turning and boring eccentrics............... 514 work too large for lathe. ............eeee0e. 862 Turtle—derby at wild west show............... 906 Twine—cutting equal lengths of................. 696 Type (Printing)—liner gauge for typesetters..... 89 Typewriters correcting typed papers...........0.eesee8. 1029 Dutch scene iene Dah thekechakenncacksens 743 fountain CE Gi ccccvecccccves 531 ated ak SE ee ee 680 making erasures in typewriting............. 329 pipe cleaner for inaccessible parts of........ 693 U Ullman, William—Your car: repair it as you go 309 Umbrellas folds into roll ten inches long............. 401 holding umbrella on suitcase............... 858 United States—polar island is claimed by....... 367 United States—Government Printing Office—an- swering 56,000,000 questions yearly..... 276 United States Naval Academy—four years at An- CNP TOs onc ccc ctccccsesesss 193 "Sy RSS a rer rey 417 . & (4 See er eee $77 POE. Paes eccakhkeictarnensabbee cee 753 Upholstering Tool—web stretcher for upholsterer 822 Vv Vacuum Cleaner—using one against flies......... 677 Vacuum Cup ee Se NS Sec hetaawebasecanseanenvens 783 shaving brush suction grip clings to any sur- Me “biedbcestindbessanuctienbendesaca 802 Valves homemade pressure reducing valve..... . 346 refitting corliss valves...........0.+e0ee0e 872 removing pump-valve seats................ 4 335 removing spring and stem of plunger valve.. 329 Van Orman, W. T.—Bumping the clouds in a nS a ahi a 5 ai oak eta hig ew @ a 210 Vanity Cases dite nbn ik bs oie eae b AES eee ose 952 in parasol grip saves carrying case......... 5 Varnish and Varnishing clear varnish for enamel..............0.+- 866 spar varnish will toughen paint............ 870 Vegetables art of vegetable sculptor........ccceccessess S31 garden truck grown faster under artificial i ctitwin ea einen awn eee een desi 893 gassing fruits and flowers to keep them fresh 953 Se ND OU DONNB. oo dckiiccccccacaces 501 Ventilation man made hurricane to free tunnel of gas... 554 Sarre 702 two way auto ventilator for closed cars..... 776 Ventilators—in window tent................... 287 Virginia—water fall found in endless caverns in nes wh ame aah éae baa au dea Vocational Education _ job sheets for vocational schools—No. 1, mak- ee a 2 ee ee re 348 No. 2, making a set of punches............. 526 Voice is pictured on screen while person talks...... 399 teachers pick singers without hearing voice 610 olcanoes—<dust from in air three years........ 607

Page 20

20 POPULAR WwW MECHANICS Wagons sled wagon for travel on rough roads....... 293 spreader geared tO Wagon........+-eeeeee 458 Walking Sticks—freak canes grown on trees by SUNN DUOMO. occ ccc ccwcceccccsaces 38 Wardrobes—folding, hooks on door...........-- 462 Warfare armored gunmen in future sky battles...... 960 army and navy war colleges train battle ME vcwnsevetbecetuks Seb eeereeeecesé 778 batteries of searchlights to repel air attack.. 209 GUE BEF Fe ins cccccccencencecceevecees 907 Riffs discount science of modern warfare... 562 CE DE, coc cnc Kinde orcecceveesitasveses 33 Warships—battle cruiser converted into airplane Pe heer rrr rrrirrcrr ee 967 Washer—has gearlike teeth.............000005- 913 Washing ——_ runs washing machine... 328 Washington, D. C. auto ~ hy signs of prism glass...........++- 768 building cathedral for eternity..... 5 cee we 27 Waste Products alcohol from prickly pears...........-+++++ 411 meal made of corn stalks for cattle......... 207 necessity forced to mother another invention 75 S |: aa 114 picking the city dump heaps............... 272 plans to recover chemicals on Dead Sea. 898 pressed bark for fuel........-.eeeeeeeeees 161 tin cans in concrete walls...........--00++- 853 wealth from low grade iron ore............ 820 Watch Case—on auto dash records driving tune 617 Watches on steering wheel promotes safety.......... 727 why timepiece is a watch.............+-+. 607 Water frozen so quickly an explosion results...... 532 i Ce OO, on cceaacee abe dew aeeeunaas 573 portable softener.........6.0-+eseseeeeerese 111 size of raindrops recorded for scientific study 190 Pr reer ee 224 CUOGRRN WHER OM. 2 cc cccccciccescececenes Water Supply force pump raises city water.............-- 1034 of New York City sweetened by mixing with “SO eee rr 3 town to be turned into lake...............- $72 Watering Trough—cheap................-.+005- 1017 Waterfalls—silent wanerialh found in endless cavern 235 Waterproof po ee eee 98 electroplating for cloth.............0eeee005 748 Texas rubber waterproofs clothing........... 883 waterproofing silk or linen...............-++. 459 Waterways—canal dug under mountain........ 928 Waterworks—constructing latest Chicago water- NS ES God iriirG baste wsan ends eck 377 Wax—sealing wax from dry cells used to nvewt - DE ia lea eee hi nee ait ode 6-309 oe RC Weather Ds 0 BORIS cpt cdin stats estcee nee es 600 forecast of severe winter based on weather ED a.55 allah sn adores oe an anno neee forecasts correct nine times out of ten.... 368 painting of clouds for weather forecasts... 803 photos of air eddies studied for aviation pur- WONGS 6c ben cd ccavadecagercsecescosesees 90 sun’s heat sought as herald of cyclones and Groughts ........cccsccecscccccscccens 20 watching it from above................6.. 243 Weaving—art and utility combined in handicraft 592 Cr Ce war taseiaMbhersbaes tanks 858 Sg ee een as 664 sheep clean up lumber yard................ 520 i, PR chvieatne-sle:ae 5a eMiaNia ne We es «a 370 betas | ding two kilowatt spot welding set...... 867 carbon prevents speller and filler rod from "SRR rari ae 71 compound for blacksmiths................+.. 1040 Wells cold -. flow from well runs pumps and en- Teer reviT Pettey Tre Tiee 37 four Shladed oil well ee RRR arabs ale 999 ee rs ree 687 Wembley (Exposition)—model of railroad yard signal and switching control............ 4

INDEX, VOLUME XLIV, 1925 West Indies birds’ eggs gathered by thousands in rowboats 789 trees yield substitute for lace...........+... 728 Whale—battle in polar seas witnessed by explorer 744 Wheat—homemade wheat dusting machine....... 515 Wheels fitted to balloon tires by hand adapter...... 120 torch to heat engine wheels removes tires CE Ss cae reseed eb ndt ch oe bah coon 74 Wilcox, Uthai Vincent AMIGTICEE GTOWR DOMINGO. « éccccicccscesesne 765 Strange ways of earning a living.......... 115 Wilkins, Harold T. Robbing Davy Jones’ locker............... 435 Training sleuth hounds and war dogs....... 915 Wilson, Woodrow—portrait in carved frame of RE MG cts chaise Mahe oe iiealhe anna ew ets 404 Windmills Holland losing windmills.................. 469 a ee ee inencuedl 1048 rigged up to run field pumps.............. 871 Windows storm window enclosed makes icebox........ 849 et SE Mi cn kd cae once eae 110 Windsor, H. H., Jr.—Homes for lean purses.... 18 Winter Sports—bring COND cat crcuseveresiicns 929 Winters, S. R.—Radio visions of the future...... 705 Wire emergency method of finding wire diameter 160 novel wire SURIGRIORET. 0.0.50 os cccceseceece 684 one man barbed wire winder................ 1037 Woman cabinet member in Denmark, minister of edu- CE PPAR EER ot a ra es bh equal to men in motor driving Geacaseecs 554 ee a ie ete 628 useful inventions I a ia ie ddiee ee doe 640 with women in the field of science........ 94 Wood combined woodbox and kennel.............. 316 creosoting poles set in ground.............. 692 cure for woodpecker holes not found....... 593 freak canes grown on trees by twisting IIR Rt aos aia us wkd Gas 6 eRAeee keen EE eee 332 making large shrunken tubs and tanks water- ESSE EEA SRR eet il ees 681 old logs show endurance of................ 940 treatment of boat lumber...............2.. 338 Wood Carving portrait of President Woodrow Wilson in frame of 1,964 pieces a 464 MEU a h.cass 6 ice sas beecasdeehoun 969 Wood Finishing—silver gray................... 676 Woodwork bench in machine shop for.................. 1048 joint puzzles woodworkers................. 491 machine has all tools on motor shaft........ 65 Workbench ee es MOUND, 5.5. nes ndndac<ede ds 651 a. ree errr 317 temporary woodworking bench in machine shop Workshop ull workshop in single tool lathe. 616 Wrenches can wrench and holder for the housewife.... 462 fitted with gauge for setting screws......... 338 loose wrench tightens with close setting. 986 self adjusting to different sizes of nuts.... 593 swivel spark plug wrench................... 242 universal jointed socket wrench.............. 873 Wringers 8 a re er ee 813 clamps to fit wringer to bath tub.......... 286 Wy & modern burning bush seen by campers in... 32 mountain falls into river and makes lake.... 432 Xx X-Ra ee eee ee 61 show how fires of body are fed............. 249 Zoological Gardens cargo of rare snakes for New York City..... 254 manger for monkeys preserves f