Popular Mechanics 1928: Vol 50 Index

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Popular Mechanics Magazine oO INDEX TO VOL. L —— 1928 ——— Ganiins Edited by H. H. WINDSOR, Jr. Oo JULY to DECEMBER, Inclusive oO Popular Mechanics Company CHICAGO

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INDEX TO VOLUME L A Abalone—diving for sea food ................. 35 “Acoustics—sound velocity in helium twice that in ENP ABER ES RRR te ae eee 752 Advertisin aided i. signs set in flashing jewels ........ 56 ae electric — made up with loose ae flying billboard has" lights underneath wings. 552 latest aid is truck with revolving signs .... 81 machine sells and talks to advertise goods.... 465 model airplane as billboard ................ 791 a ero ee 164 novel window manikins from pipe cleaners .. 682 pictures thrown onto clouds for ............ 106 plane as flying billboard shows signs by flags. 579 small car’s super-balloon tires advertise service station store front of glass booths helps draw trade.. 402 tank in form of pineapple for canning plant.. 560 turntable facilitates window decorations...... 845 Agricultural Implements cotton-plant shaker aids war on boll weevil.. 355 cultivator saws the soil for better planting... 552 cutter to shred cornstalks helps curb borer .. 418 grain register tells exact amount of crops .... 183 hoe with adjustable head saves extra tools .. 633 improvised corn planter 154 plow for flat- Rotten ditch makes sloping sides 218 183 plow that plants potatoes ................4. shocker for grain bundles saves hand labor.. 448 Agriculture Babe STOWS OM CATS ... 2... cesccssece 768 reclaimed U. S. land yields big —_ Sates ace 247 train to control wheat smut ................ 945 women farm experts in Sumatra ............ 193 Air-Mail contracts for thirty-two lines ............... 988 pick-up chute for, saves landing ............ 886 stamper prints two colors ................. 715 U. S. carried 1,654,165 pounds in 1927 .... 983 Airplanes air yacht has all comforts of railroad pullman. 937 army seeks silent to aid in attacks ........ 413 “Baby Bullet” breaks speed marks ........ 983 carrier given bath before official trials ..... 8 Diesel engine for in successful flight ....... 926 diving plane for bombing has four guns .... 712 double deck, to carry thirty-five passengers. .1001 fly from ocean liner with aid of catapult .... 545 flying fort lifts 5% ton loads .............. 785 be OO le ree re 313 landing wheels fold to increase speed ...... 401 latest navy amphibian carries guns and bombs. 80 life of, may exceed automobiles ............ 959 midget plane without tail .................. 992 sD no vcccccncsccsccsecene 810 modeled after “Blimp” ..........00.--sse0e: 818 moving pictures exhibited on .............. 255 ninety-foot tri-motor for transatlantic flight.. 280 queer, new, tailless, with movable wings .... 632 restaurant in the clouds saves air passengers. 183 rocket is successful in first flight .......... 356 six-mile-a-minute plane built in England .... 986 that carries torpedo and several bombs ...... 390 to tranport rubies from Burma mines ...... 797 vacuum brakes stops them in few feet ...... 461 er rea 897 world’s biggest seaplane ................--- 728 world’s largest monoplane weighs fifteen tons. 449 world’s record for number carried .......... 593 Airshi ; “Graf Zeppelin” the first great passenger liner. 889 luxuries aboard an air liner .........-..--- 429 new helium plant for navy dirigibles ......... 273 “R- + built for transatlantic passenger serv- oer oaiie's _ * ws German dirigible “Count Lep- oar Aloes—gathering is bitterest job ................ 966 Aluminum plating on metals by electricity ............ 811 to dull finish articles made from ........... $02 Amber—rich mine gives work for entire village .. 272 Amusement Park—coin-in-slot swinging seat .... 254 Anzmia—copper shown as preventive by rat tests. 64 Anzsthetic—administered by “robot’’ Anchors—mushroom, to hold landing fields at sea 279 Angles—laying out accurately .................. 694 Animals cemetery for pets displays monuments to .... 928 elephants serve as tractors on African farms .. 113 ills cured by latest applications of medical EE ee ee eran eer sea elephant, lets keeper stand on back ..... 888 “skyscraper” cage needed to ship baby girafte Pi CRUE WHR GEUIOUEE on 5 ccc cccccvescces 557 walking wheel tests dogs in following trail . 24 Ants ‘ nator ct ak hee wid bw arse oe 759 red to fight boll weevil ...... wer rere ree 967 to drive out of refrigerators .............. oo GS tunnel 65 feet to reach water supply ........ 89 Ants, African—secret of water supply ........... 813 Apples—stored in gas to prevent decay .......... 791 Archeology apartment houses of Biblical days rebuilt .... 762 Cambodia, a jungle mystery .... chariots 50 centuries old found in Mesopotamia 106 famous Biblical rock in Horeb ............. 761 find stables of King Solomon .............. 810 flowers found in sepulchres same as now grow reer ee ye ice king’s tomb found on Aleutian ‘peak eT. jewels fifty centuries old found in queen’s tomb 55 lost city found by pictures taken from airplane 400 man’s antiquity evidenced by new finds .... 249 men in Africa 50,000 years ago ............ 183 mystery of Indian mounds cleared .......... 418 probing the tomb of first artist of all history.. 230 quake uncovers gems buried in old tomb .... 377 seek glories of old Rome in Circus Maximus RE. ccd: deracs vw Aiki eran aetad ares een wes oe 33 Ur tombs reveal ancient sacrificial customs .. 630 was the Garden of Eden in America? ...... x-ray studies of mummies reveal secrets of past 369 Architecture home to be built in side of cliff for movie stars 239 house in form of sphere to aid trattic ....... - 179 late styles in ... modernistic city hall and water tower combined 456 new ideals of beauty shown in European cities 588 quake-proof buildings mark new construction SN 9.shutck 84-Cs hand oh Aone 6 os sao e Arctic—"“blind spot” shrunk to size of Texas .... 10 Army, Austrian—water skis for soldier .......... 791 Army, German—fake tanks screen snipers Army, Russian—soldiers on wheels to fight in gas DE chia Cenc cbhee OR Rdeaneed oeken eee Army Training—war game with model map trains citizen soldiers Army, U. S. ’ growing wings for the army ............... 642 mortar lays smoke screens .... —T6n ee Asphalt—emulsion aids curing of concrete Astronom big _ = tested at night to reveal defects ... 232 model moon carved in plaster .............. 96 mysteries of origin of stars increase with time 222 study of spots on sun aids search for oil .... 758 sunspots forecast better radio ....... telescope with giant lens to reveal new worlds 264 the latest mystery of the heavens ........... 266 world’s biggest lens to solve Mars riddle .... 636 Auger me ost, marking handle to tell depth ere 878 spring prevents from “‘running” ..........-- 1018 Automobile Bus. for road or rail ............. oo Fe

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POPULAR MECHANICS INDEX, VOLUME L, 1928 3 Automobiles armored car observatory helps guard ee 241 auto used as tractor on ice ........... ..1047 baggage car to carry autos ................ 989 car run like rocket develops high speed ..... 2 care of your auto generator ................ 1028 carrying outboard motor ................ os Bae carved Chinese for bridal parties ............ 707 cementing gearshift lever ball chassis oiling system operated by engine heat. 726 764 clerk’s office on wheels ............... dees combined with bike for deliveries ........... 593 GU ee TRG whch cai cose ckeses oe cover keeps steering wheels clean .......... 1054 fire fighters to get coffee from service car .. 949 folding foot-power develops high speed ..... 925 folding maps easy to handle ...... mbes aie-tala 109 front-wheel drive adapted for pleasure cars.. 180 glass hood permits view of motor .......... 246 guard for the starter keeps children from med- CN aha as ck Tinea cee kcike thasewes 680 license plate locked on end helps foil thief. . 368 magnets on bumper clears road of nails ...... 801 portholes in windshield help in bandit chase .. 207 power exceeds all other engine power ...... 237 roads over railways to speed traffic ........ 426 rocket car held to ground by wings ......... 191 runs ferry over river saving long delays .... 433 CU: I I oie a ies vn eet se ¥6 6% scrap steel to make farm implements paeeees 629 shaking table tests quality of car ........... 984 shock absorber for the trailer ............. 320 “skyrocket” propelled by gunpowder ....... 7 special boats carry many ........ 7 ea 937 tiger face features hunting car .............. 62 toy electric auto follows fence for power .... 926 trucks for unloading ................ ere 162 use correct type of spark plug ............. 1036 used as substitute for steam on midget railroad 416 with rear door give backward view ......... 384 Automobiles, Accessories automatic starter control promotes safety ... 384 bed concealed in top simplifies touring ...... 617 casing of shock absorber is moisture-proof .. 96 celluloid on windshield prevents steaming ....1028 cigaret dispenser contains a humidor ....... 416 cigar lighter without wire latest convenience... 545 clamp to hold luggage protects body of car.. 417 clasps for skid chains simplify adjustment .. 238 clock like speedometer withstands shocks .... 236 clock on gear lever replaces knob .......... 215 convenient location for tool box ............ 346 cord control of rear shade for driver ........ 34 drip pan guards cowl when tank is filled .... 453 extension rim on wheel helps travel in mud.. 193 eee EE Pere rere 784 fender shield protects from mud and tar ..... 884 folding armrest adds comfort in driving ..... 576 folding luggage trunk holds big load ....... 17 gas tank cap prevents spilling ............. 799 gauge that shows quality of oil ............ 425 glass protector keeps windshield clear ...... 281 handhole in side window for signals ........ 12 handle on steering wheel is aid to driver .... 208 jewels on license bolts increase safety ...... 249 light with magnet base ............---5+08 - 255 SE Be EE wave stecnccevacsewecccncs 952 mud clamps for tires prevent sticking ....... 271 neon tubes tell spark-plug troubles .......... 905 permanent jacks simplify repairs ........... 106 posture pad promotes health ........ bacuwen 256 rear signal has pointing hand .............. 226 safety seat for baby ...............- eae aond 568 spring-greasing clamp ..............+2.+6+: 819 springs on tilting seat add to comfort ...... 40 top over rumble seat quickly taken off ...... 569 traffic-light mirror promotes safe driving .... 449 Automobiles, Battery—oiler for storage, prevents EE chee eh ks kOe i Sed bo wes eoere nnd 561 Automobiles, Ciraning hose nozzle that holds soap simplifies ....... 13 revolving brush on hose ................5. 399 Automob Driving poo warning bell at crossing ........ 760 “cat’s eye’”’ traffic lights guide motorists ..... 602 four-wheel brake tester aids safer ........... 609 gearshift indicator aids beginners ....... ~.. 945 getting more —s out of your Ford ..... 676 grip plate for wheels helps out of ruts ..... 905 Automobiles, Dri —continued how to stop without skidding .............. 387 light colored clothes help at night ......... - 105 steering wheel turns lights for safer ........ 295 Automobiles, Eq it and Supplies gasoline vaporizer replaces carburetor ....... $92 roof top rolls back at pull of tab ............ 619 rubber bumpers guard car and passengers .... 209 Automobiles, Fuel—substitute for gasoline from eee dank a's bp > kd snd ahha eee eos 247 —— Lighting—fog piercing, promotes A Se re eT eee 573 pm... Radiators preventing from freezing ................... 1042 shield prevents ag alcohol on finish ....1026 Automobiles, R anti-rattlers for hood eee Pik eee owas 686 EE nag nic cwwhanneeibie's os eo 146 IE NI nn ww ce wd aur vw esis od scans 517 compensating for stripped starter teeth ...... 497 cure for rattling of brake rods ............. - 145 device helps to reline brake bands .......... 694 emergency repair on brake linings .......... 1030 eee 64 hook to straigten fenders ....... R 179 how to prevent loss of tools when overhauling 678 how to remove broken spindle bolt 339 lathe to true brake drums simplifies servicing. 625 making brake bands round ................. 172 permanent jacks simplify .................. 106 CCN GEE GID. ic cc cncccnsccccdecces 860 removing stubborn headlight rims .......... 157 silencer for rebound clip .................4. 682 tire-valve spring substitute for distributor-cap emir re Sh Wie aie oh eal tae Se 55-5. do 0:a « 525 trouble lights worn on head aid ........ 553 useful tools for tire-chains vacuum cleaner to paint car and oil springs .. 630 valve-seating tool made from old valve Automobiles, Safety Devices and Measures—visual brake tester promotes safety ................ 367 Automobiles, Tires Ee a ee 154 jack fixed to wheel simplifies change ........ 432 meter shows pressure while inflating ........ 42 pop valve for Se re Pree errr 784 PUMCTEPO GONE GOORO COTS 22 cicdsccccccceces 709 red dot guides in balancing ................ 33 shields protect balloon oversize tires ........ 1018 spring to hold valve cap prevents loss ...... 273 trough for testing those that leak slowly .... 676 Cs CONN BOO onic cas ea nccceusewne 555 Automobiles, Touring—washing cabinet contains _.. . SAR se aaa 601 Automobiles, Trucks electric cooler helps motor shipping ..... 223 Jopeeming reer Gxle Mut ... cc ccc cccccccece 518 with revolving signs aid advertising Letewewe 81 Aviation aided by old fire engine as cleaner for motors. 578 air-picked gold fields ... see Bae airplane loaded in flight from ‘metal chute. oo SH airplane takes non-stop record from birds .. 929 air-rail passenger routes to speed traffic .. 254 air service in Alaska .... wre | air sickness prevented by pungent vapor .. 609 air sign boards aid flyers win endurance record 574 airways 7,698 miles of, for night flying altimeter to defeat fogs aids safer flying .... 568 arrow on roof guides airplanes 8 avigation of the air .. , beacon on border honors Mexican NE ncccee FES big airplane beacon visible for hundred miles.. 225 Britain’s bid for the world’s air capital ...... 251 call letters for aircraft aid radio contact ...... 609 can flyers conquer thunderbolts? ........... 536 champion airwoman wins 8,000 mile race .. 457 conquer ice peril in flying with thermometer. 464 COREE WEE FP GE 26.656 68 5 cece eeessces 804 fb os gk Fr ee 434 fin for parachute jumpers aids safer descent .. 256 five tons of beef required for Byrd expedition. 591 flyers find new sugar cane in New Guinea .. 977 ll ee 65 flying billboard has lights em wings.. 552 flying police for airport traffic .............. 752 four-lensed aerial camera to ‘ou mapping... 209 France honors Lilienthal with museum mode] 39 German air lines operate 40,000 miles daily. 937 glider sails four hours on American flight ... 592

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4 POPULAR MECHANICS INDEX, VOLUME L, 1928 Aviation—continued Grand Canyon air trip latest thrill .......... 789 growing wings for the army .............. 642 half around the world in sixteen days ...... 210 hunt sugar cane by airplane ............... 74 improved neon arc light to aid ............ 296 international aero station ..............-.-. 234 OME 25 Je iat a siae haces ee esa 466, 610 lessons of Fag first “westward flight lighted air plane targets aid night shooting. . 78 lighthouses of the air 906 making aircraft airworthy ..........++-«+- 580 mask for aerial camera man .............-. 759 miniature flying field built for toy planes .... 57 model airplane as wind vane .. re mushroom anchors to hold landing ‘fields at sea 279 naval flyers get weather data .............. 763 neon aerial beacon on skyscraper .......... 999 new helium plant for navy dirigibles ........ 273 novel float tests airplane engines on water .... 385 paraffin oil on airplane wings oe ice for- mation 32 plane as flying billboard shows ‘signs by flags. 579 plane flies without pilot .............. 802 plane rigged for blind tlying to reduce night eee ‘ portable searchlight helps ‘planes oS gepeeteipee 41 propeller research to improve flying .... 602 quarter-hour air taxi line across English Chan- BS Dade be awk Gee ARRGee es ere SRE Eee 417 queer aerial cargoes 6 Were dia rupee dai a wie te 448 radio headgear to aid communication a: reindeer meat by airplane served in Alaska .. 423 road sign for air travelers shows wind direction 600 seaplane to carry hundreds over ocean in few eee ree seat on pivot ‘steadies plane for. safer. flying .. 432 Southern Cross flight a radio victory ...... 185 special paints for planes to promote safety ... 7 steel pilot guides plane without human help .. 553 successful ee in refuelling planes at oe tee the flying cameraman ° an ae ee three hundred air schools show growth eee ee eer error rey creer... twenty-five years of flying ........... ie ae uniform markers for airways .. 0 eile what’s wrong when a plane crashes? ...... 392 will rocket planes reach the stars? ........ 717 wire’s shadow guides _— sada across sea — with the air patrol yelling helps cure dizziness. in high- ‘speed said 637 Awning—inside control for ... 769 B Baby Carriage fly screen guards infant’s sleep ............ 625 motor-driven plugs into hght socket ........ 883 motor saves nurse maid walking ............ 23 Bacteria SN ON SED ceed ase cites iota newee 441 color-eating, blamed for fading colors ...... 663 Ball—repair of rubber da ee ene antes 666 Bananas—cover keeps frost * gecieieiaaaereee 1053 Bank Se i II i ir eine eee dees we 105 target drill for clerks helps curb robbers .... 66 vault opens from inside to foil robbers ...... 74 Barbecue—electric, for stores ..............04.. 802 Barnacles—new paint to prevent ..... sls gaia eal Barrels—truck for carrying heavy ........ an a Basement Oe ee ee ee ere 777 rr 2 Ce Oo ceiacesee se deaun nee 327 Basket-W eaving—where human ‘beings serve as ere ore eee ere 46 Bass, Viol—-made of aluminum is warp proof ..... 47 Bath Attachment—fountain for soapsuds and other toilet preparations ..... Batteries—removing terminals .. oso Beacons—aviation, in honor of Mexican tlyer anne Bearings SE NE Se a io-s\s cn, cw obe'd ie aa we eam 340 seplectas ball retainers ...... ccs cccccecece 140 Beauty Treatment—portable vapor face bath .... 113 folding, fits in dresser drawer ws 288 portable for the baby, weighs thirteen "pounds. 427 that gives comfort on hot nights 208 Bees honeycomb fifty feet long found in house wall. 265 SUE 2, Cuan Aw adeaied setae ebee as 350 Se MW QE: iv. c< cadkenectsndgcobbas 603 Belt . CE TUE TAD oi.xn ks hc asctasnweepess 1041 I nd cc ce Ji vewsaxceddeacde 679 shifter installed on lineshaft ............... 173 to prevent working away ................05:. 346 Bicycle I I da es Gg ia Grate hs -» 887 Ser GRIEG SRG GURNEE once ccc ccc eisecsins 961 Be Oe SE NEE, 6.6 Pew ciewenenecen dt 145 Ce a A 143 Billiards—-guide for players teaches correct stroke 447 Birdhouses EE I nics os a a mie eee £m 847 Fe a ee 764 Birds airplane takes non-stop record from ........ 929 kept away from reservoirs by crossed wires .. 460 Ce ere ee 935 ee ee 226 so stupid they are caught in fish nets ...... 951 the mystery of migration ................. . & vanish from stricken city in Greece ........ 983 when geese wear shoes .............-ee000. 553 whistles on carrier pigeons keep hawks away.. 375 Blades—handle for holding small .............. 515 Blindness books made to “talk” to the blind .......... 265 MII get no Rice) b Wit a ses en Gn os ha Baers Saab $75 Blowtorch IID Siva oye ig ban chrd a cats ote reas 172 paint removing fitting PR sa abi: 174 Blueprints drawings reproduced direct from pee oka ee holder prevents soiling = a er 694 Boats and Boating big motor boat like psmoneile for transatlantic trip ‘< a ae 216 big racing yacht splits waves é 192 boat and boots combined ..........-ccsce0e 959 boat inflated like tire, fits in knapsack Sites areal 555 boat leaps thirty-five feet in motor test ..... 32 boat propelled by pumps — eee weep 647 carrying a canoe on a sedan ... 846 checking speed for trolling ................ 144 circular metal won’t tip over ............... 976 detachable motor for barge ................. 713 electric elevator simplifies storing of sete aan 945 electric lifeboat launched in three seconds ... 592 folding boat fits on auto running board ..... 598 foot harness for oarsman aids in paddling ... 391 getting the most out of your outboard motor. 489 handholds facilitate carrying rowboat more speed from the outboard boat ........ 665 outboard hull like plane gives high speed .... 607 queer hand-propelled boat has folding top . <<a quick bitch fer & TOWDORE 26. ccc ccctccens 854 retarder on outboard motor slows speed for ES EA ee Sa ae es eee 89 rivetless, cuts path through ice ee 551 rowing practice with mirror helps train oars- RS es rubber life ring for ‘rowboats .. sailing boats with big kites is latest water sport ae 591 speed boat ‘built like wingless seaplane niente “1000 spoonlike racing oar to increase speed ...... 192 toy, your boy will like this liner ........... 691 world’s most famous yachts ................ 915 Boll Weevil cotton plant shaker aids war on ............ 355 red ant entered in fight agvinst ............ 967 Bookkeeper—mechanical ........... ee .eeceeeee 105 Bookplate—how to make a color stamp (aa aehatee 669 ks bright bindings attract more readers ....... 636 concealed in ring eka veoese EP erst 813 lamp clamps on PCr errr evn ide% 729 made to “talk” to the blind ................ 265 Boomerang—throwing is great sport ...... s 671 Borax—to kill mosquitoes .................005- 562 Bottles emergency method of opening ............. 1022 glass tube in cork serves as funnel ......... 214 Boxes—of varying height handled by adjustable tote-box truck

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POPULAR MECHANICS INDEX, VOLUME L, 1928 Boxing—<disappearing ring ..................45: 935 Bricks—white crust on walls caused by salts .... 416 Bridges across Grand Canyon ................+. ios oa Ambassador, links U. 5S. and a eee 914 big steel has span of five hundred feet ...... 441 Eads, tests show strong as new ............ 952 guarded against collisions by old ships ...... 459 hand-operated balance still used in England.. 929 stone arches replaced by steel span .......... 250 twelve miles long to span Frisco bay ........ 358 Brush—homemade for applying tar .......... -..1018 Building Construction apartment houses of Biblical days rebuilt .... 762 concrete slab walls simplify ...............+- 413 hoist run by truck is latest aid ..... 617 houses built flat on the ground and raised. to CESS A reer 635 new, eliminates plastering ................. 737 noiseless age seen through electric welding | PSO eee ever CT ieee 217 ac for cutting rafters aids roof builders .. 216 Building: “health hotel’”’ shaped like a steel ball ...... 783 house in form of big globe ................. 729 late styles in architecture .................. 813 Burglar Alarm ee I Sn vinlink’ais clas sie pe wea ctke ee 95 sound waves set off ....... eee ae Butter—circus display modeled BS cai’ oy aon ee Cabbage I IR i Si wis Sie tee a Ohlats Wein see m6 635 six-headed plant has eight- foot stalk . 34, ae Cabin—quickly built for camping requires no nails 417 Cabinetwork—attractive wooden trim for ..... -- 687 Cable stand for linemen .. «anbig oats. ee ten-message, to span the ‘Atlantic err Cacique Wood—‘“magic log’’ found in jungle .... 8 Cake—in form of skyscraper —— half aton .... 285 Calipers—rough-and-finish ..................04. 1048 Calking—automatic gun leaves one. hand free ... 206 EI 7s Ce acaa waive ve bh weede enon . wae Camera |]... og SF eee Pere 716 measures speed of lightning ............... 785 sextant, records its location on earth ....... 712 Camera, Aerial—portable for still pictures ...... 992 Camping : ; : cabin can be built in hour and requires no nails 417 carrying case for gasoline lanterns cexewds ae ice machine for tourists run by auto ........ 24 kindling cubes simplify starting fires ....... 113 kit holds chairs and serves as table ......... 897 large, folding grate for campfire edna ee lunch carrier and table combined in one — 385 old auto chain holds pots over campfire .... 675 pipe frame on auto holds canoe ............ 332 pocket sundial and compass for hikers ...... 56 portable bathing pool serves auto tourists .. 577 salt and pepper shaker AG ERS OE NE 676 washing cabinet for tourists contains first- aid kit ial ai an tea i i tne) bog ah A 6b we 601 Can Cover—self-opening ‘and closing Saat as 5 Candle—homemade lantern ........... le aan a Canoe—pipe frame on auto holds ia al oo Ste aa Cans—emergency method of opening .... .1022 Carbon Monoxide—oxygen chambers saves cats at- fect A SS ae eee a ree Carillon—bell weighing nineteen tons cast for New a ahaa a ali cine Mali oti un @ diate are 15h a 358 Carpet—-holder for stair, saves cleaning time .. 63 Carpet Sweeper—with combs to keep brushes clean 294 ae sag Aluminum—how to grind ............. 699 Cathedral—model carved with jackknife ........ 816 Catnip—as lure for bobcats helps protect game ... 279 Cats—on ships to curb rat menace PERN Gaba awa 45 Cattle—U. S. to show talking cow .............. 978 Cement—in whitewash prevents flaking ......... 496 Cemetery—-for pets displays monuments to animals 928 Chain—links easily parted ..................... 935 Chair Covers—cleaning cretonne ................ 509 Chairs how to tighten cane seats ................. 1031 ee I fo bis ss ko Sadas « dlemau baw chicas 142 5 Chariots—ancient, found in Mesopotamia ....... 106 Chemistry solving the secrets of life .... Sullicte nos chiaa'sk GT will make foods to prevent famine... -_ Chewing Gum—to remove .............. 685 Children intelligence test for re Japanese, grow taller playing western sports 465 spring operated seesaw for ................ 953 Chimn drain tile is substitute for ............ 1024 felling giant, shows skill .................. 289 used as war memorial Mbthwedeeh oa s . 951 Christmas—make your own decorations .........1019 Chuck grinding, quick-tightening ........ ati 878 SEE MED heeds deen eesecucete 174 Church floodlights produce effect of stained glass win- NUE 0.0.4.4 cers aes $4. ckG eA 597 services announced by drum ‘box serving as beli 11 Churn—spring mounted, mixes food, etc. .. a —~Tapa in-slot dispenser talks to advertise go aa Py Be pect emu snons : 465 Circus inventors of circus laughs ................ 723 staged with puppets .......... he:) ai Sea le ee iW isnalwarc 6a sa eee City—model, for lumbermen ... denne Women tees 905 Clamp, Spring—for leather workers ...... :<2ee Se Clay—modeling, use for workshop ...... ; ... 874 Cleaning cretonne chair covers casvowechue rr. effective cleaner for fabrics ...... ‘ . 142 terra cotta ... cae h bel as4R ca to keep white wood work ‘fresh. iain | white sinks bathtubs, ete. .......... ee 680 white tile , csaae See windows washed from inside with spring swab 114 Clipper, Lawn—cuts tall weeds .. 2 ; 816 Clippings—cutter for is substitute for shears. . vere 2 Clock animals’ eyes tell time on novelty .......... 31 buzzes warning of engagements .. 284 thermal motor winds as temperature changes. 200 Clock, Alarm mu tiling ° samik ww pete asa bias . 509 opens hen- house door ita aek ae ae bes ali a 843 Clothesline CNMI ar Ss rete ait bop ec gh el ites gre en .-1017 kept taut by rustproof hook -. 390 preventing double from slipping on pulleys -. 676 safe and handy hanging of ....... ae $46 Clothin made of cork ... 986 women’s winter apparel | more “healthful than men’s ... hae pute See» 784 Clover—roots penetrate nine feet ....... ee 905 Coal artificial silk is by-product .... . 215 better ways of storing to prevent fires .. 447 gases from smoke may cause colds ea . 256 low grade lignite, produces fuel and gas .. 985 soft, turned into hard to reduce smoke . 440 tinted to tell brand ; ....1000 Coast Guard—guardians of the sea é* 546 Cockroach—sure-catch trap ‘ ite eat eas 685 Coffeepot—asbestos covered handle 504 Coils—pads for winding prevent finger injuries 667 Coin Carrier—in vanity case oes 398 Coins—Hawaiian half dollar a rare prize Ccsencw Soe Colds odors to curb ie weet anki kee treated by “electric doctor’ , ‘6 oie 356 Color Blindness—number affected ........., 17 Colors—odd sources of ean 11 Concrete asphalt emulsion aids ites : : ba 401 circular walls of ....... Ponce se OFF white paint for ..... Teer wire-carpet form improves “cement floor wie 264 Concrete Forms—method for cutting tie wires for. 878 Copper——shown by rat tests to be anemia preventive 64 Corks easily removed without setiaens ee 636 garments made of See a ee to remove from bottles iathwekspe 674 with slot permits sprinkling ........ ; 504 Corkscrew—for untying knots .......... ere

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"lena used to polish rubber ............... 294 improvised planter works quickly and saves DE. su vith Once ve sscdaceese oosecuas Corn Borer—cutter to ‘shred stalks helps curb . 418 Corn Flour—used to run autos ................. , 946 Corn Popper—improvised .............6- ee eseee 1036 Corn, Seed—storage shed for ................45. 696 Cot, Folding—equipped with casters .......... .. 860 Cotton gas mask protects driver of duster for boll Eo Sick Wh dane Aree wie hd ded eS ORE 637 Oe annie Gromh Mat 2. woes cceccccccceccvce 975 Cow—to prevent switching ON nae ae 350 Crane—carries house Over sea ............00-55 736 Cream Whipper—electric, homemade ..........-. 861 Crime alarm box instead of phone speeds call for po- Es Cee ches haaavak h AOR aCe haa bank vault opens from inside to foil robbers.. 74 camera detective convicts poor-box thief .... 400 microphones in jail room to trap prisoners. 295 movie camera in phone box helps trap crooks. 555 on the trail of the swindler ................ 242 portholes in windshield help in bandit chase... 207 sound waves set off alarm to frighten burglars. 78 target drill for bank clerks helps curb robbers. 66 tear gas club for policemen to help conquer crooks 5 tear gas traps murderers in jungle valley nee ee two-wheeled forts aid police war on bandits.. 248 Crocodiles—how hatched revealed by photos .... 709 Crystal Mine—yields lenses for ultraviolet rays.... 813 Currency new paper money to be aged to prolong wear.. 555 seek longer life for paper ...........---.+-- 281 Cushions—leather, improvised .............04-. 861 Cyclone—why grow stronger as they move north- Pe then k carer see eke chs SAR Rees covcces OD D Dam, Coolidge—to reclaim desert .............. 708 Dams—quake recorders to warn of collapse ...... 367 Dandelions—roots pulled out by long-bladed weeder 460 Deaf—sound-absorbing walls help to hear ........ 912 Deafness—electric ear at telephone latest aid .... 366 Deaths, Accidental—one-fourth occur in homes . 586 Defense Wall—to be built by the French ....... 450 Dentistry probes wrapped by motor .............. aan Oe ultraviolet rays reveal tooth cavities ........ 257 Dents—removing from metal ware .............. 680 Desk—and piano combined ...............-055 999 Diamonds big, life story to be filmed .................-- 935 diving for in sunken liner ................ +. 934 increased yield from Congo ................ 974 red, eighteen-carat found in South Africa .... 936 Dictaphone—words recorded on wire ............ 977 Digestion—human body portrayed as a factory .. 626 Dirigible—radio photo of “Count Zeppelin” .... 927 Disease eight more lepers freed by U.S. ............ ,999 gases from coal smoke may cause colds ..... 256 low frequency radio waves to help treat .... 230 patent remedy for rickets .......... nica Vaio 290 radio transmitter helps treat ............... 801 ridding pets of vermin ....... ce ccsccccrcces 1024 Divers diving for diamonds hidden on sunken liner.. 934 tests made by navy in pressure tank 8 Dividers—with bent points for marking centers... 349 Diving ON Re reer re ree eer oe eee 35 queer suit to reach greater depths CDeet es eee 224 Dogs portable heated house .......... eal ea vitae ail 333 EG wes ccceeaetuneeenien wharade 514 tested by walking wheel ................ 24 Don Quixote—carved in wood assumes different SEES CC MIEREPELICeee eer ee Tee ee ++ 447 Doors double, for one-way passage ............. eo $26 folding partition is substitute for ........... 608 Pe eee -- 801 rubber cushion silences slamming ........ ee 953 securing with loose-pin hinges .......... aoe BS with bronze grills guards against burglars ... 255 POPULAR MECHANICS INDEX, VOLUME L, 1928 Door Announcer—silent butler answers door at fees GE DEROM. oon cc cccccss vaca ceeeunee 180 Door, Basement OME oda id oes keane e knee nesak alee coce GD simple base prevents sagging .............. 680 Door, Cellar—idea employed in excavating .... Doorplates—artistic, beautify home Door, Screen—metal guard prevents breaking mesh 441 Door Snubber—ends slamming and helps fight flies A Draftsmen—simple rack for ... 041 Draftsmen’s Supplies—drawing “table attached to PD cactus sac waa a Lck ie kike dd sc ee ene ncwe ae 143 Drawers—to prevent ee ee 701 Drawing Table—attached to door ............ -. 143 Dredge—stranded, liberated with ice ............ 450 Drilling—kinks for accurate .................4.. 702 Drill Press—small hand, treadle feed for ..... ... 858 Drums—erip for metal, to prevent accidents .... 45 Duralumin—Junkers reveals his secret of handling 414 Dyeing—indelible crayons simplify .............. 89 Dynamite I I is 5 dian 6 Men a a 881 i eC Orr Pret 727 E Earth—shape under sea gauged by submarine .... 968 Earthenware—repairing small cracks in ........ 1022 Earthquake—uncovers gems buried in old tomb... 377 Easel—improvised with kitchen chair ............ 496 Educational Methods child’s piano playing guide .............. Pe ‘microphone aid teachers as well as pupils ... 218 Eels—two years’ cruise to explore mysteries of.. 640 Efficiency—decreased by noise causes millions loss 226 Electrical Machinery—cooled with gas, more efh- Jehen seca a« 6b os eek ¥en. 925 Electricians’ Supplies—wire commenter eliminates OR RR eta meta a ann ee Electricity aluminum plating on metals ............... . 811 apparatus makes books “talk” to blind ..... 265 high frequency current used to treat colds ... 356 power from a new kind of perpetual motion .. 554 power tapped from trolley wire without stop- reer rer ee bok ak nee 577 the new age of electric heat ........... ee what a cent’s worth will do ................ 446 Electric Fan-——modeled like Lindbergh’s plane, cools NN a aa o'n she a Ghea'aG bora Rew Mee aanke.a 355 Electric Iron—without cord .................00. 726 Electric Lights Se rrr eee oo S97 giant bulb for special purposes ............ 273 grow wheat in thirteen weeks ........ etka ee seSector miade of tisfoll .........cccccccccs 141 Electric 2 ts, Street—dimmed ‘to tell time in South African town . bstacsbeeeee aus 81 Electric Meter—cabinet to hide | Sas We ickec tae 158 ner Motor—tiny, keeps time for accurate meter- LPC RRER ES Sa Dae bh de we Das 6 eMelek pala 459 Electric Plugs a, ae eed er es sae eae 483 with safety light to help prevent fires ...... 636 Electric Power—WDiesel engines may displace super- in Kies Oiies bn wea WRK Desk eek ace eS 802 Electric Signs—changeable, made up with loose SE. SC eehAsd ows Cd e oe vees0% bees Gane 290 Elephants serve as tractors on African farms .......... 113 NE IIE Fie Gtk alta: a'8xins.'o aca a x drier ak 557 wrecks railway in India ................ .. 819 Elevators electric, simplifies storing of boats ....... . 945 vacuum tubes give automatic control for ....1000 Engines idea of explosion older than steam ......... 600 oval cylinders reduce friction .............. 791 Engines, Diesel for airplanes in successful flight ............ 926 for railroads decrease fuel costs ............ 887 ee I IN os ids wnt owes oe deen 988 Engines, Marine—new type of magneto ones Pia 727 ee See ra ae ara y seme ue -» 336 to keep in good condition ................. 667 Ergosteral—ounce is equal to six tons of cod ge FREE ee ene eae -. 290

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— we UViOCnwoeweaSsS FF YreVeee NN 45 00 00 91 126 87 88 27 36 67 90 42

POPULAR MECHANICS INDEX, VOLUME L, 1928 Exploration five tons of beef required for Byrd expedition aoe most of the world yet unknown ............ 391 Polar, mysteries GF 2... 2.2 cceccecescceseces 361 two years’ cruise to study mysteries of eels .. 640 Explosives is more powerful than T. N. T. .......... .. 440 tons shipped without loss of life ...... jess ae Eyes . brown withstand glare better than blue .... 40 glass house to save your ............... —— rested after strain by picture chart .. ca, ln big factor for success in sports 422 Exerc apparatus for neck promotes health .... 295 F Fans, Electric—fitting brushes on .............. 1030 Fatigue—treadmill test for athletes aids study .. 79 Fence barbed-wire, stringing tightly .............. 874 old boiler flues used as posts ............... 173 ee Pee erat Fenders—for desk save silk hose ............... 278 Ferry run over river by auto to save long delays .... 433 ship that swallows trains used as ....... acs 2 Fertilizer apply with hose while watering lawn ........ 200 SE ME ncccccersescwnee sy nvns 729 SPER GU TOE occ cee cctccccccscecccossnees 142 Files LETTER OCUCT TC CTC CTT 1040 weighted handle prevents breakage .......... 1054 Filling Station Se SY NEE cbs censdcdasecsrrcsecaves 885 umbrella-top, has automatic gong .......... 257 Firearms—secrets of the Great Smokies ........ - 26 Fire Escape automatic rope holds one-thousand pounds .. 925 wall-gripping ladder prevents swaying ...... 40 Fire Fighting euttaatie hand extinguisher will not dam- age goods ....... Sik Ged anied Fae eke me 96 fighting fre RN oo a hte aoe erga eis th 570 foam generator stops fires in oil storage tanks 237 mules carry pumps to help guard forests ... 460 on the trail of the swindler ............ cose 242 oxygen tube in hose to help save lives ...... 112 rubber suits for dock firemen keeps wearers ree aes ais pew Muaan< new ae ot -- 633 service car to serve firemen coffee .......... 949 tests with chemicals help reduce losses ...... 280 tower of steel gang planks to save lives ..... 427 SIE A iiicaes Cie O ide ce estweisn were 75 _ water “watch dogs” guard logs for paper .... 968 Firemen—walk in water with rubber suits ...... 926 Fireplace—portable furnace saves fuel ..... Pa iedeak 399 Fires destroy two human lives every hour ........ 715 Fires, Forest Saaeur ai iha Sich: im oe ah WO 729 dynamite used to fell trees ......... Saou 727 Se I ES has ccc eccascadsevessas ee 50 Fish and Fishing air-fed minnow bucket keeps bait alive ...... 13 aquarium tests show fish answer call to food.. 248 automatic line reel aids in bait casting ...... 7 checking boat speed for trolling ............ 144 COS Br BE 5 oven eticcs cbesteeveces 224 fish shipments kept frozen by gas flame .... 288 holder for the fishing rod ................- 668 loosening stiff fishing-rod joints ............ 666 minnow net comes apart for easy packing .... 236 a motor retarder slows speed for troll- two tendo tools for the fisherman .......... 679 why fish do not bite .......... SiN Ges oh oe 366 Fiashlight carried om boat .........cccssece Se eT 678 kk DR en ee <a ayer 157 used for photographing SS Fe eee 1029 worn on coat leaves hands free oN prope re 988 Flies—how to keep out of the house ............ 504 Floods chain of bonfires warn of expected ......... 753 concrete mats to prevent Mississippi river ... 45 seven-ton concrete braces help curb ......... 272 7 block, without nails, deaden sound ...... ais 636 ressing, in small space ........ Rae Ga 508 remedy for squeaking ...................... 025 ier Surfacer—sands edges saving hand labor 109 bird houses made from ............. bekw ben 847 how to hold on shelves .................... 143 fif tu Id found ty centuries-o ound in Kgypt ......... 578 plant pills grow bouquets .................. 177 Flypaper—how to make ....................... 327 Flywheels—wallboard disks protect workers ..... 513 fo eae Mwave kaw siée 373 ee. 2 2. 579 treated by ultraviolet ray ......... ileka dene 91 Food Chopper—used for clamp .. . 508 Food Di eeps food clean, reduces cost. 887 Food Supplies—five tons of beef required for Byrd e RE SCR Ree CUO rca tae ere 591 Football—spray wagon substitute for sponge .... 715 Forest Fires mules carry pumps to fight ................. 460 started by sparks from horses hoofs ...... 579 Forest Rangers—leaves serve as wind gauge to aid 888 Forests guarded from peril of fire by road breaker .... 368 8 IR air Se ta ee 377 to be guarded by plant that resists fires ... 609 Fort McHenry—restored by army .............. 985 Fountain—shaped like Christmas tree ........... 986 Freight—master scale for railroads to aid shipping. 189 Frogs—lids move upward when blinking ......... 729 Dewe—aney trisiee With ...... cccccccceccvecces 994 Fruit Squeezer—fits on table and saves time ..... 254 Saves juice and protects hands ............. 911 Furnace air moistener promotes health ............... 609 sawdust burner instailed with .............. 761 Furniture chairs slide easily over any floor ......... 903 combination desk and piano ............... 999 combination seat, cabinet and workbench ....1043 designing, to cover radiators ............., 697 folding dining table with benches attached ... 885 how to make rush or fiber seats ............ 875 eC ce at cnan Ranikwhe wens bad on 1044 nc win edeas wearin ae eens 1025 two tables of modern art .................. 863 Furs electric comb and iron for ................. 959 rubber lining helps drive away moths ..... 11 G Galoshes—how to get more wear from . 1026 Game Laws—man’s law on the Yukon .......... 291 Games bowling, rubber-tired disks used for .. 934 “‘jitney golf” played with old auto tires ..... 1027 Sy ED Ske onde cdeen snd sownewe 862 e SE ve cnneckdee cebeeed bbecws . 777 CM ou chccksden Kemeny ee een 165-341 control for doors reduces accidents jhe .. 446 cca nctan ohinld bees ees 1000 Garage, Accessories hand-size brake tester ........... wie “oe meter shows tire pressure while inflating cree. SO Garage, Equipment and Supplies SO SPO i6 ccd eewenawnaeend ve 975 homemade tire spreader ............. 154 seat for auto greasing attendant ..... 339 Garbage—gas made from to heat homes maf. 992 Garbage Truck—dustless, promotes health ... . 446 Gardening fork 1s tilted to increase leverage ...... 456 paper covers over gardens help prevent weeds 385 porch cabinet for tools ............. 677 Gardens—revealed at night by electric Hloodlights 449 Gas escaping sounds alarm to prevent accidents ... 545 made from garbage to heat homes , . 992 Gas, Fuel—boiled out of metal in electric furnace.. 619 Gas, Mask—‘‘sniffer’”’ in factory tests .... 999 Gas, Poison—carrier on motorcycle is latest army oe Ge Gascuns POrTvTTTTICTirrTr Tie Te

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8 POPULAR MECHANICS INDEX, VOLUME L, 1928 Gasket, Rubber—for high pressures ............. 693 Te eee ee ere din ate faces 872 Gong or bevel cutting also serves as compass ..... 797 for duplicating diameters takes place of caliper 690 Gauge, Pin—easily made .............-.0.-+-05 - 496 ears ct ae wkd ac eave mene eee aeah Sard 140 repair for broken tooth ........ pais ate alan acatcarS 1040 Geese—when they wear shoes .................. 553 Geological Survey—modern wizards of water magic 274 Geology—earth is slipping westward ............ 904 Ss new in Yellowstone National park .......... 817 ee eS Erne tr rere 288 Giraffe—‘‘skyscraper’’ cage needed to ship ...... 241 Glaciers—tell their secrets in clockwork ‘“‘diary’’.. 256 Gland—animal, extract from to save fire victim ... 885 Glass—working in machines ............--655555 1043 Glass Blowing—highest skill required for eyes .. 224 Glass Eyes—require blowers highest skill ...... 224 Glass, Optical—big disk tested at night to reveal _ Ne ee ese. oo dud cian® Sucre enine Glowworms—why they EE ee emer 376 Gott—distribution Of .... 2. ec rcccccsescccvess 79 Gold Mines air-picked gold fields ............0-.5+s+00 . 754 hunt two lost in Oklahoma hills ............ 885 Golf ball retriever saves logs .......--.cecsscceee 17 coin-in-slot games tests skill ............... 88 course for hotel guests built on roof ....... 359 dummy as instructor shows proper form .... 240 grip guide for players helps improve game .... 233 guide teaches putting .............-.0--005: 80 indoor game played with cards ...... oa press for clubs keeps shatts from bending i a putter, mechanical, tests grasses best for OREN rere ere cer eer ieee 753 GCOPET WOE OM WISE 20.06 wc ccc ccwvcecens 1001 stroke meter measures length of drive Heck) ae tee that aids long shots and doesn’t get lost.. 453 Grain—-shocker for bundles saves hand labor .... 448 Grand Canyon—new bridge across to replace coned 989 Grape Vine—over century old .. 993 Grass—that pushes back the sea to aid farmers « Se Grate—camp, simple folding .................... 861 Greenhouse—back porch used as ................ 874 Grocery—automatic allows motorists to shop in cars 374 Guitar eee Perr re 1026 silver, amplifies tone through diaphragms .. 8 Guns army mortar lays smoke screens ............ 763 spring, from old umbrella .................. 318 Guns, Gas—like fountain pen ................4.. 736 Gymnasium—how to make, for home ............ 849 H Hafnium—found in sun ................00..05- 33 Hailstorm—clouds bombed ‘to eee pe 593 Hammer—nail holder on .............. 776 Handbag—with eiectric light saves search | in ‘dark 397 Handcuffs—use thumb cutis instead of .......... 789 Hats ; changing styles, as theme of decoration for ER Oe ry CT ee tee . 279 how to prevent sweat marks on . felt eee restiffening straw and panama Rite cae odode 331 with eyeshade eliminates sun glare . ll Health—women’s winter apparel more healthful IRE A Oe ee ree 784 Heat, Electric—the OO OE bb do<ca cs caw ccns 730 Heater keeps show-window glass clear .......... Te... solar-heat machine ES rr err 951 Heater, Gas—preheating water for es ae tay ee 1016 Heat Waves—borne by warm air from the gulf .. 632 Hedge—accordion cutter leaves smooth edges .... 207 Hedge Trimmer—electric prolongs life of vines. 799 Helium new plant for military dirigibles ............ 273 A ote as dog, Ge hsminaate & 6 iecnca's: oe ab Wim HER 618 Highways among volcanoes opened in Hawaii ..... 459 automobile, on canyon wall is marvel of engi- EE seas ord ats& Kid aad eS 114 automobile roads over railways to speed trattic. 426 Highways—continued new, through the Florida Everglades ........ 627 < super proposed for autos to cross the nation .. 561 Hinge—lock for loose pins .............-..-... 1029 Hobbyhorse—that walks, newest child’ ee oe 913 Hoe—with adjustable head saves extra tools .... 633 Hogs ee ee 319 a Pe reece 340 Hominy—when first made by the Indians -....... 433 Horses —training circus Pete Ragen 258 Hose—on street protected by pipe 5 cin sts Sea a Re Hose, Garden holder saves steps ... a1 sWetme ke <a oval-shaped washer prevents loss 5c 4 sprinkles more lawn through mist nozzles .. 390 sturdy eupport for MOSSE .... «5 nck. cicccese 141 Hosiery—how to tell fashioned from imitation .... 201 Hotel Gell course Batlt om TOGE ..... ccc ccsccces 359 stranded on old street level .. x. are Reale < e Hot Water Bag—has electric heater .... s.41 oe House—glass, to save your eyes 930 Household Devices 110, 286, 462, 638, 814, 990 acid-proof, rubber milk bottle stopper sees 463 ash receiver clamps to floor lamp .......... 110 attachment prevents thumb sucking ......... 286 attractive birdcage cover ....... Kies = baby crib, combination <a brush, scrubbing, long handle for ou ... 814 candle support catches drippings Sire aan 287 carpet sweeper, vacuum attachment ......... 815 celluloid form for washing end eee ee 463 checkerboard cake tins tok Aah Oa Re 991 chopper to make meat OS as aed 110 clothes brush holds cleaning fluid .......... 287 combination book holder and lamp .. . 815 combination desk, game rack and table set for children .... 638 combination stopper and strainer makes dish- pan of sink aes cau eek ee 287 combination window ‘cleaner hate eens cooker for gas stove 4 ee ee cork-handled, floating bath brush ..... .2+ 462 decorative window shelves for tlowerpots .. 639 drip catcher for sauce bottle sas gamenna aacnt ee drying rack folds against wall ............. 991 GE DORON GE WUD oa. oo ok ose ceesvacas 462 enmity cheamed fod Oreee ...w 006. ccici neces BO electric iron without cord ............... oe oa evenly distributing floor waxer oo Bas folding dining set includes ironing board oe eee fork clamp . eS Sa eae ale garment hanger fits in 1 door frame inves 991 hand-crank fruit squeezer .. ne Teawtar ae hot water bag has vacuum cups ere hs iron, electric, folds up into a table 814 ironing board bag Srcntion long pieces drag- ging on floor cee s vey kettle whistles when food is cooked i ee lemon squeezer and strainer fits over glass ... 441 meat carver holds joint while slicing .... 986 mirror with handle containing nail file and ID sats 6:7 1.4 aG wena Sees G6 <8 ee 286 molds for freezing custards and creams : 462 mop that unwinds fabric and supplies oil or water ... . dace sss Oe nickel-plated rolling pin holds eleven articles... 462 pastry cutter ale 287 perforated aluminum plates for kettles prevent burning ithe’ ital seh aie pitcher with “built-in” handle ith aeee ae pocket-size washboard for travelers ......... 463 portable electric heater .... Leben eae ws 286 portable electric water purifier ea ees oe 286 pouring cap for milk bottle . ........... 110 row of kitchen bins holds supplies and dis- penses them through valves ; . 463 rubber and bristle scrubber for cleaning pans. 111 rubber wrench for sealing or removing jar caps 639 salt and pepper shaker combined ............ 990 sanitary container for scrapings ............ 814 shoe-shining cabinet concealed in wall cones ae silver balls as substitutes for ice .-.......... 110 sponge-rubber dish washer . 638 spring stopper seals holes in condensed milk can 111 tray for serving meals in bed ............... 110 twisted clothesline requires no pins .......... 638 wall brackets, candle-shaped bulbs for ..... 814 ee eae eee eee 991

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Cearcroeftowerw =~ VS oOeeo Oo ne ee —pe POPULAR MECHANICS INDEX, VOLUME L, 1928 Household Devices—continued white webbing baby harness keeps child in crib 639 wire pot-cover holder .................ee08 . 844 House Numbers made from old auto license plates ........... 667 eT ee eee 508 preventing from discoloring paint .......... 1036 House Plan ............ 176, 352, 527, 703, 879, 1055 Humidifier—air in homes is “washed’’ to guard PE Perce ft eee ee Hunting—boat and boots combined for the duck ESSERE Re Sa ee eee eee Hydrogen =. seated valves for ........ 338 Hydroglider—huge, built for Atlantic record .... 415 I Ice automatic shaver cuts cost of drinks ........ 31 SD MAS OE NE ois ci cde do icasevcins 1047 GUE I Ge EE Sn os eer ceeenckcaeecanes 43 machine for tourists run by auto ............ 24 packed around fruit trees to foil frostbite .... 47 Icebergs coast-guard patrol tracks to lair ............ 967 seek birthplace, to protect shipping ........ 398 Ice Cream—stand like igloo .................. 47 Incinerator—in form of tree improves looks of yard 575 Incubator reading the thermometer ............0sc0s- 690 thermometer lighted by small lamp ........ 847 Ink clip prevents blots when ruling ........... 1031 OES ae ene 678 Ink, India—how to use in fountain aaa 347 Insects ants tunnel sixty-five feet to reach water supply 89 have larger wings than birds proportionally.. 727 EE GE ec a chbccan kee tac skeess 6's 759 pyrethrum-soap spray kills ................ 332 secret of African ants water supply .......... 813 that devour insects, protect plants ..... cone) tee trap attached to casters ............-- ccoo ae GI IE ED eiveee kaa ndacde dr aeenwaeuas 950 Insurance—patent, protects inventor and maker .. 279 Inventions—sand loader developed from toy .... 225 Inventors—the unsung heroes ...............-.-. 202 Iron CE MEE nica tecssd ccedstescegrnatelen’ 696 deposits created by bacteria ................ 441 molten, carried in vacuum-bottle ~—* car .. 356 sheet, cutting and bending ....... oe B68 structural, fixture for bending 1042 Ironing—turpentine in starch prevents iron sticking 686 Ironing Board—on bed springs saves space ....... 7 J Island—pirate, in Gulf of Mexico, to be modernized 927 21 Ivy Poison—etfective chemicals for ............. Jewels fifty centuries old found in queen’s tomb .... 55 in foreign street pavements .............-. . 241 Jewel Trees—how to make .............00.-055. 137 “John Hancock’”’—meaning of the term ......... 402 Jungle Fowl—hatches chicks in London zoo .. 376 K Kettle—gives whistle signal when food is cooked. 254 Keyhole—luminous paint on ................. .1029 Key Ring—serves as picture-frame ‘clamp icscnce Keys case with swivel hook ................. 284 making a key impression ............. 845 with bottle opener top ................ 73 Keys, Automobile—case prevents rattling and loss 616 Kindling—cubes for campers simplity starting fires 113 Kitchen—scissors handy in the ................. 856 Knife—automatic sharpener gives keen ‘edge ae Knots—you should know ............... ere L Labor—where human beings serve as burden car- eee cee tae Ladder—folds in small ‘space ‘and holds “heavy GRAS 9 er ee Lampblack—melts ice to free steamer ....... sos Oe Lamp Posts—concrete, are spun ..............45 904 9 kame Shades ck ot 317 green-disk, fits bulb .. ia co ae making attractive “Ballontini” behGanachs 511 rotating, helps focus light _. ; ., 190 Lamps eR OE Siac chi vx wweoauadaacwhens ce 729 for health trentmemt ............0.0000. 769 removing broken auto lamps a> Ne: 860 Lamps, Table—an unusual ................. 1049 Land, Reclaimed—yields big crops .............. 247 Lanterns carrying case for gasoline .............. 158 for porch combined with mail box ........ 401 OEE ee eee 505 medieval, easy to make .................. 681 Lathe SL ee 350 to true brake drums simplifies servicing .... 625 II inchs os acsnk coaed sawels « 698 Lathe Practice—ball mounting for roll ...... 516 Laundry—million pieces daily for sleeping car .. 241 Lawn apply fertilizer with hose while watering .. 200 easily made concrete roller .. cen oe renovator to clean reduces hand raking : 272 simple soil-testing outfit to improve ; 94 Lawn Sprinkler—from a flowerpot ............. 506 Leather—to preserve old .. ea Lemon Squeezer—and strainer fits over ‘glass ... 441 Lifeboat—launched by tractor .................. 721 on ee er eee 778 Lighthouses—of the air ............cccccccecee 906 an artificial sets new record with flash ......... 66 measure speed of, with two-lens camera .... 785 safest spot when strikes HE SCN ee 62 tall buildings guard others from ........ oe: Oe Light Waves—easily bent around ball .... nee Linen Closet—pull-out shelf for 1030 Linoleum baseboard helps keep rooms clean 464 fitting snugly against raised concrete border. 698 protected from stains with auto finish dope .. 9 Linotype burr remover for matrices . nila pea a ph ee, holder for ejector blades mere ae 139 Lint—brushing from heavy fabrics ...... ean ee Locks for sliding windows ................... a 333 for windows ... Rute aA oats ee ee 666 keyless, helps prevent theit. 25 remote-control electric ee, for slid- TE MOE case ccsssencecses ' , a kak RECS eRe ie cae eee 141 Locomotives burns gasoline and speeds switching 215 cab in front of big engine affords better control 398 direct steaming ends smoke evil .. 63 from wood burners to steel giants 5 a section, makes sharp turns . tinw Oe Loggin — = brake for saves time ; kee 788 the romance of modern i ae ‘ 970 Logs for paper, water “‘watch dogs’’ guard 968 split by exploding wedge to save hand labor. 374 Lubrication—oilcan seal prevents waste ... 790 Lumber ‘ mill uses salvaged, and cuts logs in shapes 576 one stick builds two Japanese houses 884 shipped in packages to save waste and time. . 264 Lumbermen—model city for, affords many luxuries 905 M Machine Parts—accurate measuring of keyways and grooves ... 699 Machine, Recording —for store helps tabulate sales 236 Machinery—an inexpensive universal joint ...... 1051 Machines the unsung heroes Pantacwn wattle 202 to mark dismantled parts ‘sein ; se 518 Magnet en ON OE ES iw dic de dae cer ee eondea 801 rids road of nails .. ee r onan 810 collapsible case for eile Pace atime 937 theft-proof box er .. 504 Mail, Air—annual mileage is six ‘million . . oe 228

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10 Mail Box combined with porch lantern ..............-. 401 EE Nie raGsctewcis+ ce eRasenacnen 929 Maps—folding, for autoists easy to handle ...... 109 Marines—with Uncle Sam’s devil dogs ......... 67 Mattresses—to handle more easily .............. 158 Measuring FR POU UC EEE eT ee 784 half capacity of containers ................. 1017 Measuring Can—adjustable, for the shop ........ 340 Meat : flavor added before killing ........ Peres . 432 wringer makes tender and does not tear ..... 376 Meat Carver—holds joint while slicing .......... 986 Meat-Cutting Machines—how to sharpen knives . .1050 Meat, Reindeer—dropped in Alaskan village by air- inn a oo ea vik sladie Sain wipe ae ad wen pa ees tk Mechanical Drawing—paper clip holds triangle.... 877 Mechanical Man—that moves and talks ....... .. 960 Medicine—aided by electrocuting plants ......... 181 Memorial, War—chimney used as .........---+> 951 Mental Tests—show mind works best at night .... 225 Mercurochrome—removing stains from clothing ... 505 Metals : ” mystery of rusting .........6.-e-seseeeeeee 782 new, for auto uses .........+.-- eas eeesnavees 977 ounce of barium saves phone millions ....... 960 Meteor—engineers seek rich minerals in Arizona. . 453 Milk “SS. ere es errr ren: ee 951 keep fresh by iceless cooler ........----++++ 224 kept fresh by radio waves ........-..+. a+ 602 Milk Bottle—lock holder prevents theft and dirt.. 386 Milk Cans - - cooler for, simplifies handling ...........--- 641 rack for auto truck ..........-.--eeseeeeee 696 rack for draining ........-..-+.sseeeeeeeee 699 Milk Cooler—spout shifts automatically ........ <a Minerals mystery, curbs fire and prevents rust ........ 95 new magic in treasure hunting ............+-- 58 odd, used in paints, mined only in Utah .... 399 rich, sought by engineers in meteor ........ 453 Mines and Mining . Edison’s miners safety lamp to prevent ex- ee SPO eee ee ++ 586 electrical prospecting holds hope for new mines 992 fire fighting underground ............ esccsse OS giant electric shovel speeds work at coal mine. 464 handmade smoke screen aids safety ......... 400 the ghost towns come back ..........-..-55: 442 two-filament miners’ lamp prevents time loss.. 193 Models te : cathedral carved with jackknife ............. 816 four-day liner tested in tanks ............... 25 knockdown yacht easily assembled .......... 62 marvels of mechanical age explained in exhibit 34 miniature flying field built for planes ........ 57 moon carved in plaster with dental drill ..... 96 ee Serer 764 Molasses—poured on waves saves ship in storm .. 427 Molding—improvised plane for making .......... 332 Molds—putting to work .......- 0. 0c cece eeeeees 560 Money—armored car observatory helps guard .... 241 Mop—self-wringing, solves carrying problem .... 200 uitoes Mosaic NE ES Ae ee 562 spray tank on motorcycle helps kill ........ 752 Mothproofing—the clothes closet ............... 497 Moths constant vigilance required to keep homes free 423 kept from corners of drawers with turpentine 510 preventive, also purifies air ................ 598 ridding upholstered furniture ..............-. 502 trap for catching night ................ ais oe otor detachable for barge has safety propeller .... 713 valveless for airplanes has few moving parts.. 897 wraps dental probes .........-..-.-0++ i. ety ee Motor, Automobile—governor for stationary ..... 670 Motorboat—racing, speeds 70 miles an hour ..... 811 Motor Bus—Pullman of road includes berths and EE aio aos ands om 0 Oa.e Oe ee oaad-ed hare Motorcycle ; oaaer rest aids flying start ........... wii ane 575 leaps through paper hoop ....... sicig asc so 237 spray tank on helps kill mosquitoes ........ 752 three-wheel-brake sidecar promotes safer riding 217 three-wheeled travels rough ground 232 POPULAR MECHANICS INDEX, VOLUME L, 1928 Motor, Outboard boat leaps thirty-five feet in test .......... 32 carrying on automobile ............cesesees 157 getting the most from an ................. 489 preventing loss of propeller ................ 675 Mountains, Great Smo Se es a — ee —_—— by electricity ... = ou ruit-jar top, is always set .......... 4 Moving Pictures : airplane crashes made to order ....... + . 804 apparatus for retouchng film lessens eye strain 208 5 camera in phone box helps trap crooks ...... 55 CEMUMOCD OM GIPIARES, 2.00022. cc eccssveges 55 film nightmares get zest from distortograph.. 112 films of amateur developed at home ........ 448 huge liner as studio affords realistic scenes.. 223 lenses on screen give depth to .............. 761 move wheat field to get picture effect ...... 953 of life processes with clockwork camera .... 358 puzzle of wheels solved by painting ......... 41 “shooting” thrilling fire rescues ............ 108 slow movies of voice to aid stars for talking coe SO ON ee Pree s: 25 strap holds camera for steady pictures ...... 236 the amazing story of the “talkies” ‘ 938 Se SN GE IS Sik so vicnatcccGlocescccks 778 x-ray movies to show bone knitting ........ 912 Mumeeto—how 6p wee Mt . oo... cc cccccccciacecse. 19 : 2 Mushrooms—produced in old beer-storage cellars.. 218 Musical Instrument—how to make a Chinese fiddle 848 Music Lessons—on multiple keyboard aided by PE a iio. o. vob ecaish nos aie a Ole Gc ae ae .. 619 Mustard—leaves sold for greens in eastern markets 271 N Nails holding small, securely .................... 54 still made by hand in parts of England ..... 200 to fill holes in yellow pine .............. -.. 340 National Defense—Uncle Sam’s latest weapons.... 403 Navy, British—wireless-controlled battleship used EN IE ikon bao ba baclekinc teen cee aad 282 Navy, U. een OE UNS GOD. irs oo se caipaciecces 786 lighted airplane tragets aid night shooting .. 78 Neckties—electric press for, helps preserve fabric.. 230 Neon—beacon on skyscraper ................... 999 Neon Lamp—solves problem of high speed machines 988 Newsstand—portable, helps patrons catch cars .. 587 Nickel—to polish tarnished .................. -» 496 Noise—cause millions loss in decreased efficiency. . 226 Northern Lights—what are they? .............. 792 Nuremberg Castle—magic beauty revealed by flood- DEM Ga sd sche Chae hanetec tanks pca@e orton 601 O Oars—spoonlike racing, to increase eae 192 Ocean Depth—over seven miles shown by echo SES SSAA oh one asl ee aaa ie ae Oceanography—shape of earth under sea gauged MP EE sacs ssadcls ceinadeebeeaewanbet Oil draining from wooden barrels .............. 164 Renting wath Gymammite «6. oak kcesiccvicces 881 study of spots on the sun aids search for .... 758 tank blasts on ships prevented by waste gas.. 592 yields flavor of peaches and soap ........... 950 Oil, Floor—homemade ................... ee 337 Oilstone Ns bioalain x an.6:5-c's bean needs cae 1053 i Sr NN: xs Bike waa ewes awa aceon ‘ 516 Oil Well I cktt wis ame eine aink @ wk Ue oral atdh a See 43 time bomb reduces hazard ......... ° ae 17 Organ—improvised blower for ~hurch ......... -- 668 Ostrich—hunters catch live birds with auto ..... 10 Oven, Electric—cask-shaped spreads heat evenly.. 455 Oysters noises made by hamper sea radio ........... 887 produces 16,000,000 eggs .................. 369 i ET ON oda alc hnes ah ines wand lene 929 P Pads—felt, keep glass table tops in place ........ Paints and Paintin, : adjustable scaffold ee Peer a good brown wood stain ........... pea ee

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ae a ee ee ee ee Se POPULAR MECHANICS INDEX, VOLUME L, 1928 Paints and didi nities . 3 ~5R SSSR oer i 334 cleaning old brushes ...................445. 667 coal is tinted to tell brand ................. 1000 electric paint-spray gun ................... 993 EE I ND vce wes eweeensdivaces .. 858 hints on the use of aluminum paint ........ 508 keeping paint cans sealed .................. 857 luminous paint on keyhole ................ 1029 moisture resisting paint .................. . 844 paint-removing fitting for blowtorch ...... . 174 ee LO OE Oe 715 special paint for airplanes to promote safety... 7 sta‘aing wicker furniture .................. 319 stenciling with feoagmer ......c0....--2s000. 147 synthetic weather decides quality of paints... 24 white paint for comerete ............cccccees 1018 whitewash for various purposes ......... .-- 1030 Pancakes—automatic machine for ............... 953 Paper i om for, water “‘watch dogs” guard ......... 968 made transparent for tracing .............. 1035 punched from stamps sold by government ice ae scraps, make decorative pottery ............ 859 Parachutes fin for jumpers aids safer descents .......... 256 jumper broadcasts during his descent ...... 936 seek silk substitutes to improve ............. 81 SRE Oe IE ib isc s oie eer Caw nee 391 Paraffin—on airplane wings prevents ice formation. 32 Partitions—retrieving articles lost in ............ 858 Patents number granted Edison ....... jwapene ae protected by new form of insurance ........ 279 Pavement concrete tested, to prevent sag ............. 418 fabric for cement road simplifies repairs .... 233 non-skid motor road material stops accidents.. 598 valuable, in foreign streets ................. 241 waves in asphalt removed with shaver ...... 637 Pearls fake revealed by camera ................... 738 found by bushel in early days of America ... 969 Pecans—cracker prevents breaking the meats ... 6 Pencil—one-piece automatic, seldom needs filling.. 402 Petroleum—world’s, will last three thousand years 905 Phonograph combined with stereopticon ...........s00s. 936 fits in watch case proves owner’s voice ...... 712 record folds up in cigaret case ............. 817 unit for making own records ............... 285 Photograph Negatives—removing emulsion from old 320 Photographs—stage scenes from vacation pictures. 1015 Photography oe ~ GU GD oss coerce ae ee ee 506 camera detective convicts thief ............. 400 cure for slipping tripod .................-. 338 five photos in one exposure ....... ..1031 flashlight used in taking pictures at night... .1029 focusing cloth for windy days .............. 174 four-lensed aerial camera to speed mapping .. 209 holding | small steel articles for photographing. — “mirror” effect obtained on dry days ....... photograph made on steel with high aiadien. 240 portrait plaques in bronze recall ancient art. 414 rapid printer helps political campaign ...... six pictures in three seconds with sports camera 414 small-size camera copier has three lenses .... 377 use of pack films in cut-film magazine ...... 326 washing prints in the kitchen sink .......... 351 waxing surface of photographs ............ 667 Photography, Aerial lost city found by airplane pictures ........ 400 portable camera for still pictures ........... 992 the flying cameraman .......... Senwetta gates 378 Physiology Have you a ninth sense? ...........---+0005 962 man is modified by what he eats .......... 579 Piano and desk combimed ........0.s0 ses -ceeees 999 child’s playing guide simplifies instruction. ... 217 re-gluing ivory tops of keys ............... 17 Pigeons Carrier—wear whistles to keep hawks away 37 = ; Pigtail Connections—tinning ................... Pins—office, holder saves time and fingers ....... 710 Pipe ee 700 cat belpa CheaM .... 222+. cee cscccvcccceess 803 closing small leaks in fittings .............. 164 collapsible workbench made of .............. 1054 protects hose on street ........-..eeeeeeee 1051 11 Pipe—continued steam, seven-foot, made by arc i Pipe Fitting—facing ........ “ pe Speesesting ical oe Pipe Line—for water eed ied ome to noid OO ee ee Cue CRDOE SS ONO OHseeee 418 Pipes, Smokers’ 0 8 ea eer ere eee self-adjusting cleaner .................. oe 283 Pipes, Water electric flatiron thaws frozen .............. 1029 alas Nwaws sawn 1025 Pirate—island in Gulf of Mexico to be modernized 927 Piston Rings—keep edges sharp .............. 854 ONS I III ii sag ood d vh ie cen eebed ss 1048 Plant Ills—spies to detect, to protect home crops.. 790 Plants : cabbage and radish crossed ................. 249 effect of electric lights on growth .......... 25 electrocuting, as aid to medicine ........... 181 fire-resisting to help guard forests ........... 609 grass pushing back the sea to aid farmers ... 550 lilacs blossom at Christmas with aid of chem- MN cds namn tl tte aiis e6enduee on ke cone 716 new eg PO Eee eee 635 “pill” causes plants to grow in water ...... 632 protected by insects that devour insects .... 735 Suvives Dy cmGs PGIME ... wc. ccc csasccvce 391 IE 6 Sileire Sinks Reewboweadecenaws 80 six-headed cabbage has eight-foot stalk ..... 574 I I on once kiexecuwaee - 936 treated with radium to speed growth ....... 618 water hyacinth produces chemicals ........ 427 Plaster—cutter bores holes without making dust. .373 Plaster of Paris—kinks for using ............... 153 Plating—aluminum on metals by electricity ...... 811 Playground—Ferris wheel for, boys invention ... 790 — Apparatus—outdoor gym for children. 12 for flat-bottom ditch makes sloping sides .... 218 Pe I IO, swiss cccecivaccctucssas 183 Plowshares—from autos ....................... 629 Poison—oxygen chamber saves cats affected by NP ED od as rc%aku Gti ee is bate sane 913 Police i Oe UD ONE oo ac oceeca wees ee 752 motor tricycle carries five men ..... arian tga summoned by alarm system ........ eis vw in use thumb cuffs instead of handcuffs ........ 789 walking faults revealed by treadmill test .... 618 Polish-—homemade stove ..................00:- 1022 Porcelain—the art of imitating ................. 499 Porch—posts show history of hats .............. 279 Porous Plaster—to remove from the skin ........ 331 Potatoes—digger and sacker saves hand work ... 376 Pot Cover—wire holder ..................c0005. 844 Pottery—decorative, made from paper scraps .... 859 Poultry es IS Gc cad wow wdascccicce 1023 burlap used on nests and roosts rere darkened brooders stimulate chickens growth 516 easy method of cleaning nests .. ...1027 eggs tested with eyeballs to insure hatching os aoe hopper for dry mash ...... 502 wire basket helps turn eggs in incubator tray 347 Printing cece ccosesnascess, MOO timesaving in casting type ..............«6. . 668 Psychology do faces reveal forune? ciel i akiphe scans 777 intelligence tests for babies ................ 764 irom wire acts a8 merve OCid ......cccccesess 736 Pulleys—overhead, measuring ................. 1051 Pulse—visible record taken with electricity inven oe Pump guard prevents splashing ...............¢... 145 inclosure prevents from freezing ........... 1048 locking clamp for pipe ..........c0csseesee: 346 three-way spout eliminates adjustments ..... 630 to hang a bucket on the spout ............. 506 Puppets—circus staged with ................ .. 713 Purse—keeps coins sorted ............esee0ee- 284 Putty—stain, to match finish ................ ., 694 R Rabbits—skins rival leopard tur ...... ; ..... 368 Rack—simple for draftsman .............. 1041 Radiator—auto, preventing from freezing ae Radio cause of hum in a.c. sets ............ re! cleaning the soldering iron ........ hoa ee POPULAR MECHANICS INDEX, VOLUME L, 1928 13

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12 POPULAR MECHANICS INDEX, VOLUME L, 1928 Radio—continued Radio, Condensers—continued combination a.c. and d.c. test set ............ 301 reducing line interference ste ane 5 em ete device reduces motor interference ....... ... 840 variable, drilling templates for ............. 840 electric plugs of soft rubber ............... 483 Radio Construction gauging reamed-hole sizes Ais octets . 482 ee ee ee ee ecc se see veckanca 827 guides ship without crew .......... cote age ee kink for starting nuts ......... id eo ee 1008 handy program index ..... widia cb soca OE Bs IIE 5 ois ccc iinccsadoanass: Oe handy tone and volume control ....... .... 124 Radio, Eliminator handy tool for set builder 5 fia “aoe build this compact B .. eee Siariy io: headgear for airmen to aid communication .. 587 direct A-supply from charger : Svat lak oa headphones on loud-speaker lines ....... .. 663 electrolytic kink for B ....... ioc mata atcca ae helpful hints from experts .......... 3 "1010 woltage Giviee® for B i... 2... cc csi ccs cr cscs OS identification of 2erial and ground connections 664 Radio, Installation increasing range of voltmeter ............. 1008 better reproduction .............. ee SE 20. OUUIU: Sas ices it cscncaseaees 664 soldering lead to lead .. ite awcawe 309 new socket of universal type .............+. 136 wire holder simplifies soldering we eS -1009 noises made by oysters hamper sea ........ 887 worth-while hints on wiring ......... res Northern Lights help in Alaska ..........-- 648 Radio Loud Speakers pin jacks simplify connections .............- 1014 artistically designed ............. a2ciaeG oe reducing local interference ...............+- 311 compact exponential type ........... err reducing local interference .............-.-. 664 eS "hit ES ONES 6 pinnae, Seas ne ree me .. 487 secret of echoes sought high above earth .... 608 dynamic, is operated from light socket ig eleart S simple control relay for chargers and elim- employs double diaphragm ....... =e xd we eee ee in colonial type tilting table ................ 124 station set on incline to help. control waves” .. 455 make this effective drum .................. 297 Southern Cross flight a victory ............. 185 novel unit ie btu de acraa anes ae 651 telephoto of dirigible ‘Count Zeppelin” ...... 927 practical kink for cone .... en eee) 312 OP SS PN WG boinc cceacncseisasves 1002 err use care with power apparatus ............. 477 quieting ... igi i Laelia 475 voltage supply for test table ................ 486 simple panel for connection ................ 482 Radio, Adapter—compact short-wave ............ 131 using two or more .......... sere wae Radio, Aerial : Radio, Pictorial ......... 125, 302, 476, 659 antenna protects building ..... -.seeescees. 306 Radio, Receiver building a telescope antenna ................ 310 amplifier for crystal set ..............002+. 826 ae errr Se EET: 662 a Spanish desk cabinet feateen 654 homemade, underground antenna ......... «+ 488 detector circuit without B-battery .......... 310 misused antenna insulation .......... ern, expert discovers tone purity by ear — mounting loop on portable set ....... «ne ore five ways to electrify your set pide as bee ee 303 SE I IIE oo cece cic raswnedses 126 good tuning devices important a2 onl ere Semis FOF MARIS... ons cccecceccsicce BOO handy hint for builders .... . ae a SY ere eee cere 487 RO I a sien cd ns ne as's aaa ee Radio, Amplifier—an inexpensive push- -pull = avetts 311 keeping the set dry mig re kk be ial Radio, Apparatus—r.f. transformers for screen- modernizing old installations 660 grid tubes ........ Ore eees werdsessese ... 840 new Browning-Urake uses screen- grid tube. 479 Radio, Applications new Perfect-Tone Six . .. 835 amplifier for phone aids deaf ................ 32 portable is equipped with screen- grid tube .. 653 as alarm to waken people .................. 209 power installations require air ............. 487 low frequency waves to help treat disease .... 230 practical hints for set builders .. 652 microphone aids teachers as well as pupils .... 218 regenerative, keeping detector tube from spil microphones in jail room to trap prisoners .. 295 EE rere anes . 826 new tests for radio waves as disease cure .... 560 service hint for power units .... ae portable loud-speaker set aids foremen ...... 250 special fuses needed to protect the é: z= a radio for taxi passengers helps attract fares.. 600 tables for electric sets ................ ne radio phones link ship to shore .......... . 253 Radio, Reception rotating radio beam — to aid communi- extra grounds bring DX record ............ 132 No iwiv cis siirednse(naisuweeenacins ene es 448 fading signals in a.c. sets .......... + 2 9>ieae ee scores of ships saved in Great Lakes storms... 386 improving the tone of old sets j 1007 unseen salesman helps auto buyers ........ 222 razor blades make headphones diaphragms.... 661 Radio, Battery Charger—contacts for vibrating ... 484 reducing power-line pick-ups ............... 301 Radio, Batteries tone filter for magnetic pick-up ............. 825 et eer eer ere Radio, Repairing building an Edison type B ................ 127 an ask ob cS Pav Cama wien ees 664 charging from‘d.c. supply ....... aia ang pices 300 by-pass condensers .. OF. _... 827 comb for spacing leads ...............4. ~- 477 drum, hums and crackles ...... bday eaen Me correct gric bias saves kas aie eed a niele ee 126 handy testing points ..... js : ee C-voltage depends on B- voltage eae rae ee 312 haggle SA ae ee ane an 488 how to obtain C-voltages ..... sccccevccses 483 insulating the screwdriver pa eS 486 improving the hookup ........... teetiasene See safety insulation for screwdriver ............ 663 old auto generator as charger ............... 307 test points from phone plugs ................ 309 paste protects terminals .............. ..-. 485 Radio Rheostat—safety stop for screw-in ........ 301 prolonging dry-cell life .............. -.... 310 Radio, Television reducing Charser NSIS 2... 26. e eee ccceees 1014 condensing lenses aid ........ ere rss simple method of testing B ..............4. 488 how to build a receiver ................... 1004 testing, and power units ................... 1009 DNC och 6 na dig 0.4 orale Owe kinine use 5 750 trickle charger, homemade ... Gentes tok ya aot latest apparatus in Ss EP Pr Rea Pon 1013 vibrator charger changed to tungar .......... 135 new parts for experimenters ................ 652 Radio Broadcasting NIE Salar pr Lae oss 'anticl gh On Ken, Kee dam 820 home device ..........65.5: 477 Radio, Transformers—iron-core R.F. ........... 134 parachute jumper broadcasts thrills of his de- Radio, Tubes a base makes SE NN as << acdttn i er 5 le es orcaiuind dav 475 speech in eight languages at same time ...... 295 RNR 8 ip wdc wcsnaids a ovonig coc 131 tower on mountain reached by cable cars .... 568 glow, often causes hum ................. vei ae Radio, Cabinets—a Spanish desk .............. 828 heavy wire for a.c. circuits ................. 484 Radio, Coils homemade filament control units from old SS Ss ccdkacicab nonce ap amb muds 307 EER CES BI RI ORE Rig epee 26 homemade rf. choke ............cs.cceees 834 homemade line voltage RM oo oe ad 1009 r.f. chokes prevent distortion .............1014 how oscillator tubes work best .............. 483 winding kink .............--.sssseeeeees 475 _ ak kD ree perpen 136 Radio, Condensers ue ee ae eee 124 giant i etd tal 6 cages data wva nck 8 484 new Perfect-Tone Six employs screen-grid . 835 low-loss midget ..............ssseeceeeeees 124 Se SN OE WN Gs. vas bv sae kctecweeiencnkaak . 485

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POPULAR MECHANICS INDEX, VOLUME L, 1928 Radio, Tubes—continued EEE DOE CA ted ba Si s0s ences ekmaomawes 662 SE I os ic vcae os sebacae wakes 135 DE a eC svn ns 6h d2dk ent veeawse 477 r.f transformers for screen-grid ............ 840 STN 0 big ante web cans Wak sn 660 screen-grid requirements .............. 1008 I, oo Cone scackoeétanic ewan ¥es 133 SE Sra dada aio ieb ans gyiaksh's owas 475 Radium Di SE ED rh ko anecn secede as arlene 391 used to speed growth of plants .... 618 soe av powerful explosive ‘than Fietenesce Soauseccd cue 440 Railroads air-rail passenger routes to speed traffic . 254 baggage car to carry autos ................6. 989 boiler inspection hottest job on . 760 Diesel engine for, decrease fuel costs - 887 elephant wrecks railway in India ... 819 England’s crack train takes non-stop record.. 454 expenses cut by riches from the junk pile.... 568 in front yard attracts visitors .............. 925 midget, uses autos as substitute for steam ., 416 million pieces of laundry daily for sleeping cars 241 permanent stop sign on tracks wie os Bee portable electric alarm warns section gangs. . 796 rubber pads for ities ain ct Sura pele web's 729 train to control wheat smut . 945 two-deck sleeping car has hotel comforts 569 Rain Gutters—protection against clogged . 157 Rays veoenin, linked with creation of matter .. 714 invisible, emitted by rapidly growing am rare ee 456 invisible, pierce fog to guard ocean liners ... 799 lamp for health treatment .. Rw isowe oe oe plants subject to sunburn . . 936 Rays Ultraviolet crystal mine yields lenses for 813 reveal tooth cavities 257 textiles that allow penetration to body 461 Razor blade stropper uses two steel balls 952 “parking” space for blade prevents cut cape 215 rest helps blades regain edge : 993 using carborundum stone for sharpening 676 Razor, Safety sharpener whets both edges ... . 633 thick blades last indefinitely 254 Reamer—non-reversible holder 336 Reaming—with drill press 696 Reflection—ot sun and moon upon ice- crystal clouds 599 Refrigeration gas flame keeps fish shipments frozen . 288 iceless cooler keeps milk and foods fresh . 224 Refrigerator more space in . 331 Rifle—fired with one ‘hand, “wins ‘British ‘prize. ; 632 Rings book concealed in ........... . 813 cleaning large set ........-. 685 Rivers—hidden, explained by nature of soil 34 Roadster—electric, seats two and goes anywhere. 640 ae man now given the viet ot “ Rock Drill—counterweight for electric icon ee Roller Skate—quick clamp prevents accidents 553 Rollers, Snow—clear roads ....... .. 782 Roots—clover, penetrate nine ee . 905 Rope—homemade machine for making .. 343 Rotors—tested in deep pit to prevent accidents. 6 Rowing—practice with mirror helps train oarsmen 257 Rubber . chemical prevents oxidation of . ae 278 suit of, firemen walk in deep water with .. 926 Rug Pins—hold rugs to floor and prevent accidents 366 Rugs Opes say life is fifteen years ......... 257 to keep from turning up ; . 510 treatment for storing ..... . 669 Rust—mystery of metals ................. 782 S Safety Devices and Measures auto rings warning bell at grade crossing .. 760 automatic SOS receiver for steamers ...... 760 “cat’s eye” traffic lights guide motorists .... 602 chains for shoes to prevent winter accidents... 976 electric hand stop signal protects pedestrians. 247 POPTIT AR MECTTANTCC INNLEW waArrrace + a and Measures—continued gas sounds alarm to preven fog lamp for traftic police - x sepa nee —— —_ aids mine ‘safety ight colored clothes help promot ile Pi a P p € automobile portable electric alarm warns section. ei gan Rae rotors tested in deep pit to prevent Y aceon rubber life ring for rowboats . aaliete brake for logging workers wear tail lights ee Ford’s junk pile is grave of many ships of cruiser, bottom up, from English channel riches from the junk pile cut railroad expenses 5 Senetertenn—cteel ball is “health hotel’ Salv beach screened for lost valuables fisherman modeled in pictures “painted” Sander dustless, for floors also works on bench motor-driven saves time on scrollwork Sausage—synthetic skins from cellulose Sawdust—cakes for kindling .. Sawdust Burner—installed with furnace Saws and Sawing handy pocket saw .. how to cut duplicate pieces on a bandsaw portable electric in kit carried like > baggage safety for electrician ibis : Saxaphone—proper care of |. cn School—shop for boys of old street cars , Scissors—handy in the kitchen _.. Screen—making a Chinese : Screen Doors—removable sash for Screen Wire—uses for old Screw holder made from clock spring machine, a stick in slot of, aids starting removing broken, from wood ee Sculpture circus display in butter fisherman modeled in sand sculptor works six years on war memorial Sea Monstere —belief in faded with day of modern ships .. Searchlight—effectively ‘reproduces ‘northern Seasickness—cure for w—spring operated . Seismographs—on dams might warn of collapse Senses are your five perfect? tested by looking at world upside down Shadow Pictures—a fascinating pastime Shadow-Sketching—as a pastime ; ; Shaper, Bench—how to make a six inch Shaving Spogtes—dispencer ior cream goomene sanitation i a e* Ship Model hints for builders .. , knockdown yacht easily assembled shaping sail of a : used to test speed of ships wave cradle for . ; Ships and Shipping airplane carrier given bath before official trials automatic SOS receiver . cats on ships to curb rat menace cheating the sea clipper-ship lines return for ocean yachts diving for diamonds hidden in sunken liner false stacks used as storage rooms four day liners launched in Germany .. illuminated flagship in fleet display . invisible rays pierce fog, guard ocean liner. model of four-day liner tested molasses poured on waves saves ship in ‘storm old, guard bridge against collisions passengers put in basket to board steamer quest for faster liner bhi : radio guides “phantom” ship ....... radio phones link ship to shore ... refueling at sea is successful = rudder as high as a house guides big ship. service station for inside bottles ships fitted with two rudders to steer backward ship that swallows trains used as — special boats for autos .. speed and distance registered by meter speed tested with models ..........-+-: .. 238 13 545 440 761 695 . 699 641 367 . 419 562 . 841 146 - 869 763 751 629 799 25 427 459 769 707 353 176 226 776 39 07 937 73 65 2aane

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14 POPULAR MECHANICS INDEX, VOLUME L, 1928 Ships and Shipping—continued stainless-steel propellers reduce shipping costs. 551 90 thousand-foot ship to cost thirty million .... 3 — § ere 194 whaler hauls carcasses aboard .............. 969 wireless-controlled battleship ............... 283 Shipwrecks—salvaging .................. re Shoes modern “seven-league boots’”’ afford high speed 248 safety chains for winter to prevent accidents... 976 shining stand has screen for women ......... 710 wheel to assemble speeds production ...... 607 Shoe Shop—traveling, serves farm workers ...... 440 Shoestring—splicing broken ..................4. 683 — protect those used as crossings .... 515 i IE NI ss cco a ak wale 6 ohh Wes wR 215 made from cotton lint ............. 5. cman ari a Silos—maintenance of concrete ..............4.. 347 Sink Cleati-out plug for drain ............. ver, BOW 60 CHAM B GEOHPOE ... c..cceccicenss «am ae Siphon I 6 tag thee aig WS, him Slav ie ge ee Be be 984 RN oc ern a6-k oe Ute 648 keeps carbonated beverages fresh ............ 95 Sisal—substitute for gasoline from .............. 247 Skating—skate with jointed-blade .............. 753 kiis water, for soldiers, substitute for boats ..... 791 water skiing, new summer sport ............ 985 Skyscrapers ‘air rights” built over railroad tracks wes! ae supporting foundations while digging subway. 552 Slate—Indians used as mirrors ................. 817 Sled—foot propelled ice, develops ‘high speed + en 785 Smoke—to be reduced by turning soft coal into aati aie nas Knee b Ahh wed ee es 440 Smokers Accessories P cigar lighter without wire latest auto conven- DE Gs caw Heese sdathen es sve ene ae 545 pipe cleaner self- ORT CE eT . 783 Smoke Screen—army mortar lays .............. 763 Smokestack—built while fires burn .......... . 424 Snakes—species of rattlesnakes in U.S. ....... . 296 Snow—rollers clear roads ...............6-.000: 782 Snowplow—double-motored, clears Swiss roads. 104 Soap—homemade soft, and its use .............. 686 Soap Bubbles—blowing, to aid science .......... 370 Soil—simple testing outfit to improve lawns .... 94 Soldering a fer See ee oe ee eee Ls 1047 SE NG BONN en ace 5s ag seed ws censien 1024 Spectacles—have thin layer of metal to protect eyes 401 1018 Splicing—ends of short wires ...............-44. Spoon—on metal bottle cap aids in taking medicine 247 Sports success depends on quickness of eye ......... 422 water skiing new summer novelty ........... 985 Sports, Winter—snowshoes made from tennis RR eer ee ee ee ee q Spray—of pyrethrum soap kills insects ........... 332 Spraying—automobile runs outfit to save extra ee er iret? Perr re ret 47 Sprinkler, Lawn—underground ....... si Gi ace Stage Scenes—from vacation pictures ............ 1015 Staging—adjustable, found convenient ........... 516 Stamp Collection—Hawaiian two-cent stamp prized.1001 Stamper—air-mail prints, two colors ............ 715 Stamps coin-in-slot dispenser for post office ......... 230 Hawaiian two-cent, prized by collectors ....1001 paper punched from, sold by government .... 926 WN PMNS FOF cnn nc ee br secccccsces 761 Steam—storage in factories increases efficiency... 933 Steam, Boiling—liquids in vats ................ 350 Steam Engine—oil removed from steam by electric EE AN6 aN eds ewes qenepaneestanncegeeee 424 Steel flaws found by magnetic probe ............ 402 made without furnace by new electric dvvecenes 233 new alloy near diamond in hardness. 961 nitrated, to improve automobiles ........... 31 ag of scale when hardening ......... 695 —_ TT ee 844 ee of Damascus, known by Romans ..... 752 Steel Wool ‘ I CEN ae ow sas cae onlu a oie ba ewes 339 scrub brush simplifies cleaning pans ......... 25 Stereopticon combined with phonograph ................. 936 “spirit” picture projector to aid teachers .... 281 Stirrin Rod—-heavy, eee - 679 Stock-Keeping—‘‘want tags” for hardware store. . 847 Stockings—waterproof silk ...............2..005 383 — Battery—removing sulphate from plates .. 514 tove gasoline heater and cooker lights instantly... 413 SS RR eae 857 kitchen ranges in colors add cheer to home tae aa CE Eee eee ee 182 moving the kitchen range .... cownne SSD substitute for broken oven door spring Tere 686 Stove, Gas—improving the oven ................ 144 Stove, Kerosene—water trap in oil line ........ «+ 505 Strawberries—grow on cars ...........-...00-- 768 Street Cars—mirror on door causes women to alight RE RL La Mie 0 Street Signs—on street lights easily read at night. 416 Stumps—pulled with help of a keg .............. 678 Submarines diving bell to aid in rescues ............... 296 for polar trips to aid ocean study .......... 209 greater safety through improved design .... 207 SS SR er er eee 705 navy to test four thousand safety devices .... 383 shape of earth under the sea gauged from. 968 smoke bombs to aid in rescues .............. 601 i; Se SN 0 va ck nena os ae eioled bine ce 507 Uncle Sam’s biggest mine-laying ........... 634 Subways magic lanterns entertain passengers ........ 560 supporting skyscraper foundations while dig- BL c86Reebse5c te eekbane bak eee usar h bis 552 Sugar from corn is used in many foods ........... 113 hunt cane by airplane to increase U. S. yield. 74 Sugar Cane ‘cream” from, a substitute for syrup ....... 447 new, fiyers find me Meemw GOR ©... 6c ccwes 977 Sun—rare metal found in ...................... 33 Sundial—pocket, with compass ‘for hikers Fits aches 56 Sunspots—forecast better radio ................. 594 Surface Cars lead on gears decreases noise .............. 424 like motor bus makes less noise ............ 96 Surf Plane—speed boat covered with metal ..... 1000 Swimmi partie camp bathing pool serves auto tourists 577 rubber tube harness helps beginners ........ 593 skiff as life saving unit affords sport ........ 273 waterproof pack keeps valuables dry ........ 13 water wings from rubber balls .... — Accessories—one-piece tent easy to put -_ Quiag~tiving, like airplane adds to child’s sport. 551 T Table combination table-top and picture panel .... 819 extension sets saves space in small rooms .... 217 Se, SOP EE Sis eckson sindeeas vaes 809 “ff SEER es eee 863 with concealed ironing board .............. 815 Tags—keeping record of stock needed .......... 847 Tamp covering for, prevents dirt from sticking .... 516 ee a ES a ac ea Roe daca ow eee eh arene 877 Tap—acid helps remove broken ............+.-. 1039 Tape, Adhesive—curtain rod holds .............. 1039 Tape Line—holder for the stock room saves time ee a a eA eee: 161 Tar--homemade brush for applying .............1018 Target eT fits on fence and improves skill ...... 10 flags score automatically ............+...--. 33 that saves air-rifle bullets ............--.4+- 327 Target Practice bullets trace lines of fire to aid marksmen .... 586 for bank clerks helps curb robbers .......... 66 Taxicab—with radio to attract passengers ....... 600 Tear-Gas p club for policemen to help conquer crooks ... 599 traps murderers in jungle valley ............ 23 Telegraph getting line over flooded river .............. 161 telegrams sent in Chinese ..........-..-.-+: 818 Telephone directory in outdoor booth serves public .... 641 life tested with phonograph .............+-- 105 messages to ships and train by dial system ee eee ra ear rre eet stenaseae 289 ounce of metal saves millions ........-.--+ . 960

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POPULAR MECHANICS INDEX, VOLUME L, 1928 Telephone—continued press-button system latest service aid ....... 399 tape to record calls is latest service aid .... 633 wires in plant form show cable structure .... 576 Television condensing lenses aid ..................002. 797 conducts music of hidden orchestra ......... 716 CD I bv are c ence cagavceerd as 708 how to make a receiver ................0.0.. 1004 quartz light tubes help simplify ARI i cs 9 MT RG PAGS Nellieoucts sonia be oar det 820 Tennis SU ere COE T TT TEE ball restorer helps improve game Ee Ee 366 Tents—lastic stay ropes for re eae 667 Deis: GS Gog tiie ccc iucecevcccce 690 Theater dummy that sells tickets helps advertise 400 MRMEEET 166 TIED Gide vcsccccccasccsensd 423 outdoor, water curtain hides stage . 811 Np a ee 778 Thermometer—of fused-quartz registers extreme . DE: cesdhnn el eeia kad sheds aoe iiecedeeds 4 Thimbles—easy “tricks a cages 765 Tides “highest i NN es. cats aka ceawae 255 GE ST Or oie nas sacewbanenavansve 954 Tile Comet GOOEE BO GM xc vic scccccceeccsccccs 503 how to clean white ..... 171 Time Chart—tells correct time and place | in world. 598 Tin—treduced to dust by extreme cold .......... 264 Tires gauge and deflator helps protect valves ... 598 household bluing helps detect punctures in tubes 515 inflation of Ford balloon ................ . 510 whistle on air gauge stops overinflation ss wee Tissues—growing plant and animal, emit invisible radiation a peat ates are ka. Tool Box—with hingeless cover OF Ate ty ee Oe 877 Tools cementing tongs in handles .............. 701 copperplating small ....... ee 345 device for lifting heavy work on bench 351 for driving fence posts single-handed . 164 hole cutter for electrician .. Rash kn 73 homemade beading ; 144 Ne tis ox ss bs kw kk Mieee sows oe 526 how to make a six-inch bench shaper Pe 869 improvised strip cutter .......... a 334 porch cabinet for garden id 677 quick-adjusting wrench fits ten sizes of nuts 386 shears and punch in one save use of drill .. 247 square for cutting rafters aids roof builders 216 three-in-one latest shop aid for metal worker.. 551 Toothbrush adjustable, gives better cleaning a see x's 73 made of rubber, massages the gums Ste 384 Toothpaste—key defiates tubes .... << 153 Torch—to illuminate writing pad 163 Tornadoes—houses with vents protected | Aone 12 Tortoise—raised in desert to supply food .. 280 Tower of Charlemagne falls into ruins ............ 97 of Pisa to be saved by freezing ground 359 of porcelain cups feature of trade fair ...... 883 Toys airplane for “Lindy Junior” . 13 Don Quixote carved in wood assumes different a ea oe 447 electric auto follows fence for power .... 926 flying swing like airplane adds to child’s sport 551 hobbyhorse that walks, newest .............. 913 how to detect short circuits in toy railroads.. 685 sand loader developed from ..... Bat <eic ss Ge 225 submarine that dives ............. _. ae walking duck, how to make ....... . 855 your boy will like this liner .. 691 Trac ble, useful in driving over soft lawns. 1040 Tractor Oe en 1047 inexpensive, for light farm work ........ 689 i EE rds dig Kien Osleweie0ieeuonae eso 171 Traffic autos stopped at crossing by touch of button.. 97 danger bell traps autos running past —- 562 dummy as policeman substitute for lights.... 453 shelter for officer helps guide motorists ...... 369 Trailer—support for trailer tongue ............. 844 Transformers—cutting core strips for .. 860 Transom—adjusted to chain and locked . 42 eS

15 ee of the future ........., 194 Ta "ached to casters foils insects ........, 729 Sek, sR ie Rm ie ested 677 Trap, Bow—how ile ihe Ckigsls kil cs 5a 670 Trapping ss an effective trap with live bait .. ; . 503 handy trap rE eee 857 — magic in hunting ' 58 dead, felled with dynamite sie 727 examine trunk with x-rays for defects” -. 759 fruit, ice packed around, to foil oe 47 height in Iceland __. ; ae 629 help for the trimmer .... : 163 hunt mysterious “death tree” in 1 Africa : 238 ills studied with x-rays to save forests .__ 13 moving a forest ; ir iesstbiewe Oe rings to solve weather mysteries . 48 with rough leaves injured by motor fumes 587 Tricks mt ek ee Oe . 321 easy, with fruit re ak .. 994 easy, with thimbles ................... 765 easy, with tumblers Sh mieerp laine wate acta a paee—somene by rowing ..+ 803 users—without seams woven in han Truck—wheeled, for home moving . oom ats ial Tuberculosis—preventive vaccine saves lives ot a = . — 384 ubes, Bass—formin small, b My Sipe u< aaa ’ Seaton 4 e t a i se at . 346 CM screen sees ewews occas 115 homemade holder - gaia viet 331 Tunnel—eight-mile railroad breaks record 2 ce Sie 710 Turntable—in front of garage cf 1000 Turpentine to remove stain from clothing hac 503 used in corners to keep moths away ue 510 Turtles—frozen for shipping on long ocean voyage 461 Tweezers—from large spring cotter « W208 Typewriter—for the blind has six keys -. 285 Typewriting Supplies—light for keys and copy ... 55 U Ultraviolet Rays food treated by et hirenthinels.caee 91 lamp for health treatment enki ien 769 Vv Vacuum Cleaner—used as paint brush 37 Vacuum Tube—give automatic control for “ele- vators - 1000 Valuables—secret compartment for eae 146 Valves—grinding kink .. 172 Vapor Bath—portable, for face, latest beauty 4 aid. 113 Vaporizer—electric, automatic 988 Vegetables—sprayer and drain for .. 328 Vending --enpeedlienmed ee gives correct change . . 761 Ventilation headaches caused by poor circulation 816 June weather all the year in big bank building 640 Vermin protection against soe Ban ridding pets of 1024 Vibrations “death “penaaiell from quartz kills small ani- mals .. owen ; old buildings are ‘ safest from eee ea erern Ae Violins better, of rubber impregnated wood vaca ee removing dust from inside sede 683 vibrations break crystal goblets 7 818 with straight sides is easier to play 240 Vitaphone—the amazing story of the ‘‘talkies”’ 938 Volcanoes dust from affects weather .................. 802 Mt. Vesuvius due for another eruption 709 ee ee -+» SIS W Walking Duck—how to make a ............... 855 Wall calculating number of studs required 1026 circular, of concrete ........... 977 Wallboard—as a canvas substitute for oil paintings 504

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16 POPULAR MECHANICS INDEX, VOLUME L, 1928 Wall Brackets—candle-shaped bulbs for .. Wall Paper how to make washable ... steam remover also cleans surface washable ? Wall Stand—of modern design Wall Studs—spotting . ar Wardrobe—curtain and shelf form space for arfare—‘‘magic curtain’’ of chemical hides city from air ' War Maneuvers—big ‘guns on rails aid defeat of “fleet” in war game Washers counterboring crown, to hide screws ‘and nuts .. Watch—keeping clean : Water modern wizards of water magic purified with tablet ‘i Water Colors—to prevent crawling Water Filter—tractor cleaner for Water Heater Gas—button turns on, ’ saving pes to cellar . Water Hyacinths—turned into chemicals’ Watering—system for hedges and terraces .. Water Power—water speed in plant exceeds fastest auto Water Purification—by electricity oer See —system for home works automati- cally ae eats Water Tank—cement repair for ‘ Waterwheel—provides farm with water Water Wings—made from rubber balls Waves, Ocean—Neptune’s battering rams Waves, Sound—bore hole in glass Weather dust from volcanoes affects forecast for week by improved system naval flyers get facts above clouds rings of trees to solve mysteries ; synthetic, decides quality of paints .. Weather Vane—three wise owls make novelty Weeder—long-bladed pulls out dandelion roots Weight Lifting—muscle and how to use it Welding arc to replace casting of machine parts electric, promises noiseless building» age Well Pit—easy access to Whales—value of Wheat—grown in thirteen weeks under. electric lights ... ‘ Wheelbarrow—endless tread, goes through mud Whitewash-—tlaking prevented with cement . 814 1051 81 356 519 702 862 Wick—-+removing from oil stove ................ 142 Will-O’-the Wisp—mystery of, due to pressure?.. 976 Wind—judging the speed ie: wo Windlass, Spanish—pulls auto out of mud . 1023 Windmill Se GO EE: MND. search sacar wae ceee 885 guide for pump rod .. ‘ 496 large, raises water nine hundred feet. 562 “Tim Turner” 155 Window me —eaty brush to be used from the inside ; ; ion Windows heater for, keeps glass clear 914 hinging porch, to avoid trouble ............ 678 one-way sew Canine sues bce se pale hace's 61 polishing plate-g lass . ee eee 505 portable false, aoonetasilin ‘light ial acces, time trap to close, saves vas, 448 to open high swinging 319 washed from inside with spring swab 114 Wire hendy method of-snipping .................. 513 a, fh ee eri 1018 unrolling, single-handed 685 Wire Link—fixture for forming .. 526 Women—farm experts So Rr oer ee 193 Wood—water giass as filler ..............4.. .1027 Wood, Kindling—barrel hoop holds wood while chopping a .1028 Woodwork—to keep white fresh ws 163 Woodworking—gauge for bevel cutting . 797 Work—best done in autumn . 884 Workbench collapsible, made of pipes .1054 double, handy drawer for 1041 swinging drawer for 4 514 Workshop—handy and compact home 159 Wrench—quick-adjusting fits ten sizes of nuts 386 x X-rays examine tree trunks for defects . 759 movies show bone knitting 912 reveal secrets of mummies .. . dchcs Se tree ills studied with era ee Y Yachts, Ocean—clipper-ship lines for ....-....... 355 817 Yellowstone National a geyser BR Sst Yukon—man’s law on the Yukon .....