Popular Mechanics 1930: Vol 53 Index

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Bur . 0 ise Popular Mechanics Magazine Oo INDEX TO VOL. LIII 1930 Oo Edited by H. H. WINDSOR, Jr. ce) JANUARY to JUNE Inclusive oO Popular Mechanics Company CHICAGO

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= INDEX TO VOLUME LIII A Acids p morning glory petals used to detect....... rear Adventures—of treasure hunters......... Advertisi: air ettboard” can be seen hope from planes. . daylight sign for trucks. I MIEN oes voces sees lighted sphere on building...... set abausNe portable show-card writer.............+..-+ Agricultural a ar i oe effective weed hook Sutios guard block keeps plow free from rubbish. aap motometer installed on tractor rotary grader levels land.... sa sugarcane planter travels fifteen miles an hour Agriculture conquering red terror of the wheat fields..... does electricity help crops... extra light speeds growth of sugar-b “beet seeds. money from farm waste.... science seeks super-corn..... : seeding land with airplane economical method talc helps kill grain pest............ Air artificial, supports life better than normal air. geo SV ennai Air, Liquid—used in shrinking steel pin on loco- motive drivewheel Air-Mail pilot’s equipment costs thousand dollars. .... plane in flight picks mail from truck planes change mail in air................ shrinks size of U. S. by more than one- half. Ai lanes adjustable wings to control speed air “billboard” can be seen only from planes all the luxuries of travel aboard latest liners. . automatic plane stabilizer. baby commercial model ; backyard plane flies on own power. change mail in air... “coffee grinder’’ radio dial makes tuning easy En Satna aaah Sue's é.08s saws convertible ‘top | is s transparent bien ai CL SS cay las hep écwen o0eeaké economical speed hundred miles. electric robot guides without aid. fins and flippers to prevent air accidents. flown backward and upside down “flying wing’ successful in first tests... . fog dial on captive balloon to aid | landings * fuselage hung under wings on glider equipped with motor........... glider is towed across nation by.......... glider takes off from water behind motorboat. gliders fitted with motors gyroscope pilots plane heater for motor ... E height of plane in air shown by. noise helicopter plane passes successful tests. huge plane carries passengers in wings. ° hundred-thousand-dollar plane—why it won.. ice detector for, flashes red signal.......... jet of steam aids take-off from ship......... limit to the size of is set by weight.. es Lindbergh’s latest plane is built for speed.... load and discharge freight from moving pane military, being built in France...... model, compressed-air motors drive movies on passenger planes... . novel planes give promise of greater safety outboard motor for glider is forecast plane launched from top of auto plane locates gas-line leak...... pontoons turn small plane into a seaplane. portable service platform for ; ora quiet motor saves gasoline................. 785 394 7 89 809 Airplanes—Continued fiir erase pe ete ‘ 624 roll map for — | attaches to wheel 799 scale model plane is easy to build 146, 328, 500 seeding land with, is economical method.... 812 shock recorder measures landing strain..... 790 sprinkler system in hangar...... stand for engine test fits any motor thermometer gives warning to pilot......... 417 tilted on end to save hangar space........ 377 turntable aids in adjusting compass......... 961 what plane markings mean.. . 67 “windmill” plane and why it flies safely in ae Airships anchors for are one-ton rollers......... 465 observation car is hung below...... acteis. Air Wells—in desert give water.............. 7 Amusement Devices—‘‘swooper” gives thrills of airplane ride , se seevean Se Anatomy—transparent man like ghost 5 wees’ Angle Plate—for planer or shaper.......... 694 Animals ee: have odd diet and are friends to Dee AE Sra. o Soo ee 24 filmed in their native haunts ..... . 632 mummifying sacred, was costly process . wae shooting wild animals with a camera........ 58 steaks from the arctic... er Antarctica—who owns the South Pole? «os oe Aquarium boat turned into a eT eee built-in makes living picture one ee novel arrangement for "RES 1017 water gardens for the home....... 323 Archeology air survey reveals ancient ruins ; , aa ancient revealed by pumping out water..... 714 Caligula’s galley is finally exposed 42 frozen ruins of ancient city found in Arctic waste ... -_ 63 how prehistoric man ‘used the “killer stone’. 456 Maya ruins in jungle discovered by Lindbergh 64 Pharaoh’s heart proves Bible truth 84 tree rings will reveal age of prehistoric ruins 113 wall built of pagan statues... Architecture churches show modern trend in............. 427 clubhouse like an elevator...... . 369 Armature Repair—growler saves time in . .1039 Armatures—growler for testing. ; .. 170 Armor—light, for soldiers resists ’ bullets ee 460 Army, grease car like oil tanker used | yee eee 364 ao, © Ss. ugle call “‘Retreat’”’ used by the Crusaders.. 65 clockwork bomb sight marvel of 7. 62 the “West Point” of the air 561, 737, 929 Ash me yom by pneumatic tubes........ 66 Asthma—m proves successful in treating. . 953 Astronom earth’s speed two hundred miles a second... 356 how to look at spots on sun...... ove Oe moon’s color is brown. . 725 planet found by microscope on photographic Ee 968 prove sun contains carbon . 430 riddle of the stars sought in depth of earth... 584 tornadoes on the sun... . 554 young star-gazers lead hunt for new worlds.. 894 Athletic Field—hot air dries...... - 437 Athletics a hunt for future champions ve : .. 603 even speed best in long race. - . 390 Atmosphere dust—what it does 281 million bits of dust inhaled with every breath 414 Auction—register shows highest bid at sales..... 66 Automobiles abandoned fill in bay to make an Sea aas .. 441 arranging bed in two-door sedan. 3 -. 674 Au Au

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a a Av traX, A a 5 VY Ow Automobiles—Continued : ‘ : average owner paid $16.53 in gasoline tax in 1928 POPULAR MECHANICS INDEX, Pee Rai ee ie Pea ace ued € 30% o0'Sxshe 31 fog in front of, lifted by exhaust air. . . 460 gases pas through muffler without baffle plates 956 improving seating arrangement in two-door ES ee ae errr ee ee 499 jumps over hurdles in race with horse. 946 opening locked cars without key . 351 plane launched from top of speeding : 209 prophesied in woodcut four hundred years ago 983 spark plug terminal clips keep wires intact. 710 starting motor in cold weather............ 346 supercharger, water-cooled, for front-wheel IED sated & Aig cuibale Rinne w maine eee the front drive and why Pe PEL ae 10 winter hints from a racing aie eas 164 Automobiles, Accessories— anti-rattler for brake rods on Fords. 33 ash tray fitting vest pocket handy for ‘motorist 807 auto license-plate holder adjustable in size... 801 automatic choke control 63 automatic electric primer starts auto | in : winter 539 carrier rack at front of car ¥ 365 carrying nets in top of auto 640 chemical muffler removes carbon monoxide. 364 cigaret dispenser contains ash tray... . 895 clock in rear-view mirror 417 combination bench and tool box... « 703 combined screens and curtains for windows. 665 crankcase ventilator eliminates odors . wee cushion for floor protects high heels. 385 electric shift adds three more gears......... 65 electric windshield heater ‘ j 183 fan forces manifold heat inside the car 119 fastener for towrope requires no knotting. . 898 fender body repair tool............ 108 fender wing on door keeps clothes clean 390 forced-draft water heater aoe 231 four-way wrench fits all rim nuts. 182 frost shield for car window ‘ 430 gas tank lock without key cemented in place. 975 gauges for battery, oil and gas, are self-correct- ing ass 920 gear-shift ‘cigaret holder ‘ 48 glareless floodlight helps on turns. 425 handy map holder ae aa bae ons owein in 497 headlight shutter prevents dazzle ..... 714 heater draws pure air ee warming chamber cok hase S fiw eat hla ales clacios 540 hidden lock for tire mirror bids bOR OCS cue 637 illuminated road-map holder... 322 light for the rumble seat ee loud speaker for radio gives volume 982 luggage carrier on ene leaves spare tire on luggage rack on spare tire folds "when not in _ manifold heater ‘aids starting in ‘winter. 144 motor-tester reveals defects Puternnee nai 113 pedal gearshift replaces hand lever... 979 portable compressor operated by engine 465 radiator heat warms auto without extra fan 62 radio is shielded from car noises 989 rubber carpet with hair nap... . 431 rubber shackles eliminate rattling 813 sections of inner tube protects auto mange 862 service-reminder pad ‘ 72 shock absorbers for auto seats” . 513 spark-plug alloy maintains constant ‘voltage 544 tail light for “bumperette’ : 577 thermostat is easy to fit on any auto 433 three handy kinks for motorist .1035 tool rack in auto trunk. . 856 tourist’s stove heated by exhaust gas 857 umbrella and case fit back of seat. . 727 umbrella fits in auto door...... 356 vacuum gear shift......... 192 vanity mirror mounted in automobile . 1036 watch holder for the auto... 680 windshield screen prevents entrance of insects 835 windshield wiper has ten edges 189 Automobile, Accidents danger on country roads greater than in besa 108 eye, tardiness of, blamed for . 457 Automobile, Cleaning—electric connections. .. 841 Automobiles, Driving— arrow safety light indicates turns... . 918 cost of running shown on dash register. ian bie 710 . 7 apts niget VOLUME LIII, 1930 3 Automobiles, Driving—Continued crankcase cover makes starting easy......... 892 hobble limits speed of auto ys delivered... 802 making speed on muddy roads ... . 669 testing skill by revolving map. 454 Automobiles, Engine— Diesel engine furnishes cheap power...... 537 don’t neglect your generator....... 662 sixteen cylinder latest wonder............ 368 Acematie, Fuel— bootleg liquor runs motor.................. 534 wood used to run army truck...... 7 Automobile, Hoist collapsible DE dth'> endauguhebshe ceee xe 999 homemade ....... y ehouti evan ...1011 ss Lighting—portable tester adjusts UB Ae aaa sbaetes é Automobiles, aieiies for closed-car window frames............. 869 lubricating the windshield wiper 1024 springs lubricated with blowtorch. 691 Automobiles, Racing auto body used as radiator in racing car 198 eyeshield for auto racers... cw. ae four thousand horsepower seeks record aoe 768 Automobiles, Repai alcohol removes carbon in motors. 860 breather-pipe oil fumes can be used to ad- EE, Gi skin e on dda bere aes bw ws - 838 cylinder-lapping tool attached to powerdrill 669 cylinder troubles located with motor tester. 9 emergency repair on broken distributor spring 156 expanding aluminum piston to insert wristpin 345 feeding moist air to a carburetor. 1054 generator wrench for model-T Fords 700 grease pit illuminated by indirect lighting 720 growler saves time in armature repair 1039 guide for grinding model-A Ford valves..... 693 hand-driven valve grinder. ae 533 handy clamp for welding fenders... 869 holder for repair of auto Searing. 873 keep the armor dead... 145 kink for model-A Ford 525 method of scraping carbon 524 motor carbon is eliminated by solvent fluid. 985 pedal depressor for adjusting brakes... 351 powdered soapstone on gatiete ae their er ; 699 quick cleaner for piston ring grooves 862 radiator steam softens transmission oil... 333 remedy for grease leakage at gear shift lever. 859 remedy for rattling windows........ .. 858 removing humps from fenders ° 525 renewing blown cylinder-head gaskets. . 509 replacing spring on overhead valve 521 rubber bands prevent car from shimmying 143 Save-your-sleeve gauntlets ° 25 spark-plug cleaner removes carbon quickly 769 spark plug gap adjusting - 496 temporary repair for broken battery, cable. 873 testing auto valves for leaks 695 timer and ignition test on Fords 156 washers’ save time in fitting bearings. . 521 waterproofing old-model Ford cars 672 what to do when Fords boil... 526 Automobiles, Tires air-pressure dot on rim shows inflation 450 knife for tire shops made from hacksaw 339 locking valve keeps pressure constant 416 painted to match auto. 389 puncture-proof inner tubes add to life of 987 reading glass meppemed removal of inner-tube patches , 137 repair gum seals cuts in " treads quickly. 809 smaller tire is safer but wears out sooner 636 solid tires have ~ ae vas 624 what your tires tell you............. 226 ££ PO 3p eS ere 848 why racing tires lose air. 119 Automobiles, Trailer—expands into sleeping « car.. 587 Automobiles, Truck chain tread makes tractor out of na ul 97 concrete carrier mixes as it travels on....... 955 has three wheels 754 keeps its contents cool as it travels 644 Some -eeiinee WEE Goi s.n.. ns ccccccccceces 347 semi-streamlining BES itkoacs chs cent ctes 702 store on wheels expands when parked vehee 461

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Automobiles, Wheels—axles bent into shape by strength of hand............. aoseveder Aviation ' ‘ aerial photographs at three miles a minute. . aerial survey of the Hudson Straits.......... aircraft antenna shielded by fire partition.... air pilot’s equipment costs thousand dollars. . cvlen silhouette on cloth flown by real ship air riddles and the answers..........-+---+- air survey reveals ancient ruins..........-.- anchors for giant airship are one-ton rollers. are flyers born or made........... Shih eae best landing-field surface.............-..-- blowing bubbles helps build stronger planes. . British floating airdrome resembles houseboat college glider club teaches low-cost flying... . continuous-arch hangar has no beams or girders ....... ‘ 471 891 418 753 285 711 273 981 465 26 363 925 710 409 course and distance finder........ So +. 433 danger of altitude flights proved with rabbits. 32 deer hunted from airplanes...... eeseeee socee 449 dot and dash path guides planes in landing. . 766 electrically heated masks for pilots.......... 624 engine, development of L-head announced... 721 fifty years saved in one.........----.s-+5 98 floating airports to have sea legs.........-- 8 flying and motor boating combined . wseerece 895 flying boats cut the time, to South America. 414 flying fashions combine utility with beauty.. 426 flying in Eskimo land...........+--+++++++ 418 flying over jungle land............ seeeeoes 177 fog dial on captive balloon to aid plane SED cee eccccsccseccecee Sets gliding school for women..........--+++-+: 424 growth of, shown by yearly figures......... 905 half of air deaths due to pilots’ errors....... 208 how safe is flying?.........--+++-ss+eee0es 1 huge air sign aids high flyers.........-- “ssa +4 improved airport map .....+-----+eeeeeeees 2 : jumping into fame ......---+---sseeeeeere 23 landing field on long roof......---.-++++9+> 264 limit to the size of planes..........+-++++>- 552 Lindbergh learns to glide...... oeseneses ss San low-wing bullet monoplane successful in tests 999 magnetic “eyes” find cause of mystery air MED. nccccetcnsess Core esereeeeeeee 918 mooring mast on store roof for dirigibles.... 532 new motor to end fire hazard...........-++- 718 oil spreader for seaplanes smooths rough eer ree 919 parachute opens instantly as it clears plane. . 713 pilot’s flare turns on all lights at airport..... 43 pilot’s helmet has headset for radio reports. . 994 plane lookout built on Granite re oo 2472 rains falls inside airdrome........ Le eececere 542 robot that never sleeps guides landings...... 635 smallest radio headphones for use of pilots... 78 spotting smugglers from the air.........--- 715 student flyers fly blind...........-++-+-++: 623 OS eee ees eeeeecece et eceeee 962 telescoping canopy for airplane terminal.....1044 the last frontier........-.---++++eeeeeeers 242 the lightning hazard in flying.........-.-. . 359 the “‘West Point” of the air....... 561, 737, 929 three thousand airports .......-..-.+eeeees 73 traffic congestion in air..........6.-++++++- 9 transmit pictures to plane in flight.......... 16 trolley pole flash is basis of fog signal tests. . 775 wireless aids student in solo flight......... 647 with the latest record makers of the air age.. 893 Awnin; iesert”, OE WIN ook ccc ccesssccaccene 163 inside control for ......... Fa. 266 ebuene Fens 16 B Baby Carriage _ COE GOR: on vo cterccsccenscocess 630 resembling auto ........... eS acenesae sees Mee Bacilli, Artificial—aid story on origin of life...... 961 Baffle Posts—old water tanks make good........ 315 Balloons—big animals helium-filled for street PP re badwesacnaa 544 Ballroom—river steamer is orchestra platform.... 784 Balsa Wood—tool for cutting strips............. 675 Bamboo—shoots canned by Chinese........ a, 4 Banknotes—coated with tin will not tear or burn. 724 POPULAR MECHANICS INDEX, VOLUME LIII, 1930 Banks on wheels for suburbanites......... eSewiend 43 the world’s greatest treasure cave........... 34 Barber Sho: ounted on wheels............... 71 Barge—welded in one piece contains no rivets.... 399 Barn I ix 0.5.5 Ce caees 104.060 ¥ 88600400 1041 old, makes a cozy clubroom................ 684 Barometer—shaped like teapot................. 945 Basement—carpet mats on stairs................ 313 Bathing Beach metal nets protect bathers from sharks...... 637 self-retrieving cable slide for bathers........ 848 Bathtub—silencer for the...............00000005 45 Batteries if dry cells run down quickly............... 851 repairing leaky storage................ oe 337 fe ee re 161 Bearé—growth of a man’s.................e0+. 989 any Culture—taught with talking movie...... 81 ees if we had the sense of insects............... 626 live in skyscraper hive............. bs vsawae 7 Bells—tin in, softens tone...................00- 623 Belts emblem, attractive for small boys......... -» 681 _ SiRF nea iat 173 old tire prevents slipping........ : ° 865 wire solder for repairing................... 487 Bench—made into table by folding back rests.... 383 Bible—manna is found to be desert shrub. ...... 600 Billboard—air, can be seen only from airplanes... 48 a ee NS ae eae 860 ir ant eggs as game-bird feed................ 545 hummingbirds build a nest on scaffold...... 761 make trouble for broadcasters.............. 532 the passing of the carrier pigeon............ 194 _ thrills in hunting bird’s eggs............... 290 Bird Trough—for the garden...... ists. ap a. areca Bit—scale filed on, an aid to see depth of hole... 869 ladder—finding leak in basket-ball............. 97 Blanket—electric sleeping ..................... 542 Blindness blind don’t hear better but listen harder - flower gardens in scent groups for the blind.. 947 left hand found the best “eye” for blind..... t 8 Blueprints and Photostats—how to improve...... 879 Boat Dock—old carpet useful on............... 327 Boats and Boating aero speed boat with wings...... bute aedws 634 a five million dollar yacht race..... og ae: Se “alligator” ships climb hills and haul lumber. 609 auto tire prevents marring hull of boat...... 1027 boat jumps over logs, helps lumbermen..... . 769 boat propelled by pedals.................. - 369 chromium-plated oarlock saves boring holes.. 913 craft with wings driven by outboard motor.. 607 floating church travels waterways........... 440 locking oars in a rowboat. . jus phe seek +. 859 motorboating and flying combined in water- eens arse take vlawiedewaw a 895 motorboat has stern drive and reverse gear... 777 motorboat lands on beach by lifting propeller. 952 river steamer in ballroom is orchestra platform 784 safety shut-off tor the outboard motor sailboat made of concrete.......... ¢seéees Ee sailing skiff easy to build..................1012 self-bailer for boats imeks —T slip-boat for motorboat contains bungalow... 753 suction eliminator increases speed 432 tiny cruiser runs on compressed air ...1018 water glider with wings tests rider’s skill... 719 world’s most extraordinary yacht race........ 928 Boiler—steel plug for leaky.............. Kasse 88 Boiler Lid—lifter and holder................... 871 Bone—eraser for cleaning Boots and Shoes best tanning process tested by postmens’ shoes 919 heel pad holds boot in place like laced shoe.. 997 springs on bottom of, for easy walking...... 947 transparent slippers show correct size....... 957 Boring Mill—Germany has world’s largest....... 923 Bottles sink stopper for wide-mouth................ 314 stopper empties contents of jug............ 112 Bowling—with a billiard cue................... 599 Boxes attractive hampers easily made...... eevaten 833 . —... . | Cal Cal Cal Can Cam; { ' f 1 ‘ Cand Cane Cann Cano Cans- Card Caric.

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Boxes—Continued folding cardboard box has many advantages over focusing cloth ................++. 41 opener saves time in unpacking oe kawe 181 Resieg gelled mask protects face............. 265 Brain MD WEE PII bib occ nce cseccesceccsececs 189 tester, reveals time required to think. —en thinking involves muscles rather than brain eee. -oieSi8 8 497 Calendar—holds milk tickets.............. a ae Camera ON Ee ere 162 automatic reveals how you sleep.... eons Se flash gun operates shutter release........... 601 lions are filmed in their native haunts....... 632 movie, cord holds steady. . ... 686 photomicrograph, used in detecting crime .. 610 pictures of lightning taken with............ 78 snaps electric s a. . Ksceb eee 264 spring clips hol lens- board. screws cme 877 substitute for wide-angle lens............... 314 support for tripod on snow................. 333 support on auto fender.............. se torpedo leaving tube snapped by............ 896 underground shows course of oil wells....... x on, hen, A reer yonne OO ee ee > ree ere 488 Campin col oeey ridgepole for tent... awoke flashlight strapped to leg lights way. 1033 folding table for holding cooking utensils.... 849 hookless fastener for tent......... sl storing blankets on top of car.............. 158 Candles—keeping straight in holders............ 861 Cane—fountain-pen holder in.................. 753 Cannon—why double-barreled failed to ‘work san ae Canoe—backrest provides comfort............. 1038 Cans—substitute for ......... 362 Card Games—bridge score on table edge is out of Ff Beep eeerrr 9 Caricatures, Chalk—on walls of Paris night club.. 912 POPULAR MECHANICS INDEX, VOLUME LIII, 1930

Carpets a carpet-beating short cut.................. 521 rubber, with hair nap. bevse Gee Cash Register—drop bottom baffles holdups ite 874 Castings—steel shot spray on coating cleans it for painting ......... 957 Cathedral—huge in New York to revive ‘old ‘art. 969 Ceiling—how to get a beamed-ceiling effect Cc —how to keep fresh.... Cellu Articles—nail- -polishing ‘kit for mending. = Cement—method of coloring Cesspool—ejector for draining. .. Ceylon—in the land of the devil dancers... 3 Chair—light on back shows vacant seat in theater 984 Check Writer—hand operated 106 Cheese—packed in vacuum box. idsceevevceus Ge Chemicals a drug store from the sea eb ndy ch waeake 641 fallen leaves contain..............4. 39 in oil-field brine videlew ss eeu see to cool rooms also puts out fire vodeaui ss ee Chemistry human hair makes chemical... .. 645 robot’s electric eye controls chemical ‘process. 454 Children safety thumb guard for baby hie Soutien oc. 637 separate exit for, in screen door........ — Chimneys increasing the draft ........... ase wieeb wee inside form for concrete ..................1054 to make a low chimney draw. singe Chinchilla—is a squirrel-like rat of “the Andes oe Chisels honing carving tools ................ wna 158 made from power hacksaw blades........... 1056 Church architecture change shows modern trend..... 427 floating, in Germany travels waterways...... 440 of glass and steel is all windows....... 736 Cistern—makes good oil tank................. 1027 ae or holding sheet metal against a wall....... 868 for light bulb fastens anywhere. . ‘uD iaes ae handy, for welding fenders.............. 869 Cleaner—stone and cement .................... 849 Cleaning removing grease spots from shoes...........1017 rubber goods : 1021 safe cleaner for delicate fabrics ee 684 soap holder for cleaning small outs soeee 841 Climate—is our, changing Ee a Rated ds Seewo 817 Clocks alarm turns on light : <eeewee 765 combined with aerial for radio set. ve 4 giant dial of Westminster d i grandfather, you build ‘ 676, 832 operated by sunshine fs cee ile Closet anges screen on ’ provides aressing | Chatintiemmecting . 327 Clothes es grip, attaches anywhere. 783 Clothesline—shrinking new cotton 321 Clothespin—holder slides on line................ 314 Coal chute and pit for aamading | — amps bottom cars Bid microbes helped PA ea Ct hh ale 107 pulverized, burned in motor cylinders. ee uninflammable gas is used to blast.. ae Coal Mines—three lives is average price of million tons of coal . Coast Guard—spotting smugglers from ‘the air. 715 eepot—substitute for glass top... ; Collars—simple method of dividing.. Color exact shades recorded by analyzing ag 539 magic changing of, transforms ballroom. 776 organ paints ballroom with magic light ao. ae Comb—cleaner and_ sterilizer. : -ohee kh, ae Compass—course and distance “finder. eer Concrete—carrier, mixes as it travels on automo- fA erie py 955 —— Mixer—pivoted a ees «+. .1048 —one lump of, waEeee NRC 48 or —handy extractor 157 Cornstalks—gears made from, give long wear. .. 383 Cotter Keys—removing smali ...

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6 POPULAR MECHANICS INDEX, VOLUME LIII, 1930 Cotter Pin Se et CTC EE eee eee eee 338 sharpened, is useful oo eat rae ee étnaven. wee Cotton boll worms given corn diet to save annge. se picker cleans fluff and saves time...... o 881 Cow-—-with. wooden leg .........-..0s-206 Serr Crack Filler—flexible ‘ai NER. A save cneaseds 680 Cradles—for infant oysters aid culture.......... 726 Crane—swinging crane in small garage......... .1045 Cream—made of cane syrup used for cake icing. 945 Crime can you solve this mystery?....... een. ae . 948 chemical restores auto numbers... cake ee ee glass bullets full of gas used by slayer. es invisible-ray burglar alarm keeps watch over safe “FP 720 photo projector “aids j in catching fugitives . son eee talkies of crime suspects aid identifications. 9 thieves use own broadcast to jam police signals 541 tricks of gangsters shown by wget ate num 767 tricks of the smugglers...... 114 you can’t get away with it. os . 610 Cruiser—first ‘‘Treaty Cruiser” placed in " service. 758 Cutter, Weed—long handled, operated with one ans DE Wrathdsetceeetss keen ct) nbG4s Dams—queer domes form bulwark for Coolidge Dam 897 Dancing—shadow “dance on ballroom walls. ~~ Dancing Monkey—sand motor runs this..... . 839 Deafness ' body joined in radio circuit so deaf can hear 95 deaf hear “talkies” through sets on seats.... 201 earphones for tabernacle ... Se Decorating—how to stipple your own : ‘walls. ‘ 316 Deer—fawns travel by plane to restock herd . 81 Dentistry—sterilizer for bandplese helps curb disease . . 280 Deodorizer—electric, ‘kills ‘smell. of cooking. 207 Depth Finder—sounding by echo in Hudson - 449 Derelicts—sea rovers battle............ 258 Desert—air wells give water............0+---055 7 Desk collapsible for child .. db oth bid xe in er handy, attached to shop ON biden ORS eae 1041 novel ornament for ..............+.. 1025 Desk Pad—of composition rubber ian ovis ae Diamond—diggers, in footrace to mark claims. . 728 Disease electricity produces fever to fight... 232 sugar produced oe germs offers cure for tuber- culosis . use oe Divers—test suits in ‘tanks under air queues 417 Dividers—pair of scissors used as ; ota Diving—helmetless deep-sea diver............... 365 Diving—tricks of fancy............0......00... 730 Dogs carried in covered rumble seat.............. 215 fox terrier wears artificial leg 886 London garage has beauty shop added for pet 976 side rails in kennel save puppies..... 154 Doorbell eliminating annoyance - Te eer TCT. penny-in-the-slot, installed in Holland....... 989 Door Hinge—lubricating squeaky ° wh 674 Door Latch—detachable plate holds open. 873 Drafting—improving marking of draftsman’ s rule. 174 nae etn I a from freezing...... 321 Drain Tile—laying made easy.......... boxe cs ae Drawing Instrument dozen tools in one serve many oat in —_ ing ; 997 makes sketching easy ae Pee .. 961 Drill Holder—revolving top .........-..0-.2005. 882 Drillin, 4 wall without chipping brick at surface. 1041 durable drill for difficult - ccoeeks 338 elongated holes pee eépiet eek beens. ceeas 525 hard iron castings PO SE renin ee 346 holes in wood with nails. Ee ee ey 696 improvised force-feed drill ‘press pewice ke ey magnetic chip remover . cv ae offset drill attachment reaches odd ‘places 625 EE hve rekbbbiseswseseey oo. 644 Drill Press A OE ccc cc cresccenscccedene Oe PMALUE, 0206 0.690036 44546802, 0000908 . 346 Drills—taper-shank, used in chuck .............. 866 Ducks—fly as fast as planes.. , 256 Duplicator—hand-operated makes stencil copies 784 Durium—solidified liquid is hard and flexible as Se) éiyok eens ones bat $e -2+ 448 Dust million bits of, inhaled with every breath.... 414 what it does . 281 Dyes—for detection of germs ‘to be standardized 800 Dynamite—gas-well fire is blown out with . 88 E Earth interior explored with electricity . 778 speed of about two hundréd miles a second. 356 speed trap for, races light beams saves Earthquake breaks cables ..... : ‘ racks. oe when the ocean floor quakes 618 Educational aera, help ‘teach foreign languages a 240 Eggs—preserving ................. testece Oee Electrical Appliances combination mixer and juice extractor —s floor scrubber, waxer and polisher tte. marshmallow toaster prevents scorching. . 815 Electric Cover—cooks food on plate at table . 905 Electric Fan—speeds up heating conan Electric Fitting—metal disks protect fittings on extension cord . 1056 Electric Grill—two plate contains drawer oven... 784 Electric Heater on faucet warms water a he — .. 896 pocket size, cooks eggs at table. . 898 you can make sbWssae cs ; errs Electric Lights biggest bulbs three feet in diameter......... 975 frozen in ice thrill night skaters Pose ae removing hot bulbs , "1025 Electric Saw—nails cut by, without dulling edge. 925 Electric Tea Kettle—operates from light socket.. 815 Electric Tester—like a pen fits in pocket “ 80 Electric Wiring—grip to pull saves time and trouble in pana Bilee ae ewe Jasco SOO Electricity city’s electric brain in power control room 645 does, help crops cess OOM electric spark brighter and. hotter than sun 774 food shop has automatic service . 813 heated bottle to supplant furnace. . coves ae hogs killed by, German packing plant ... 809 interior of earth explored with : 778 revives infants by inducing breathing 265 traveling electrical show mounted on a truck. 785 Electric Outlets—add to, with cone plug gute 7 Electromagnets—piano notes are prolonged by 719 Element—unknown, is found in two minerals . 790 Engine—new motor to end fire hazard in aviation. 718 Envelope ene one side only Exercising achine—like big tricycle SS Exploration See ee GOD OS GE. 25 co.cc cccccsccee who owns the South Pole............ 588 Exposition *hicago World’s Fair centennial celebration. eo glass halls for Stockholm ... Eyeglasses—emergency screwdriver for...... 1021 Eyes color-blindness corrected ...... : . 533 how, tell lies coe Dae tardiness of, blamed for auto accidents . 457 Factory CE thhtu' Si rowe On naan A Wie dowswedee 592 warning tor lazy workmen. atop 1<¥esewe 592 Farm—potato sorter for the .1048 eet a support will prolong life of farm ET <cithe-< whe k ses ud an ware ages 44-6 es 850 Faucet ball valve shuts off water when removed . 358 wall recess for sillcock. .

Art rt sg ot — s Fi Fi Fi Fi Fk Fle Fle Gam

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POPULAR MECHANICS INDEX, VOLUME LIII, 1930 7 Fence holding wire taut with wagon wheel........ 339 portable, requires no posts...........-++--. 696 Fence Posts—how to preserve...............+:+- 349 Fencing—is great DER re thehcnes enue .. 138 spo Files—old, made serviceable by acid treatment... 527 Filling Station—like plane ae Fire Alarm—unit complete in itself. stone el 957 Fire Blanket—held on frame. sake nd Seat Gna Fire Escape fire victims slide to safety down tubular chute 289 lifeline to escape from fire is self-operated.... 533 Fire Fighting abandoned trestles turned into auto roads.... 284 background for fire extinguisher : ay, ae electric eye puts out, by ns smoke..... 717 fighting fires with powder Joa . ne pistol-type fire extinguisher .......... con, ae Fireplace air-circulating, maintains even heat ......... 719 furnace made of .......... SST novel screen for .. 669 Fire Prevention—chemical ‘to cool rooms also puts ER bu wa kd 04 aeeo 952 Fires—germs cause on farms...... saat so. Fish and Fishin aerial bombing of porpoises ................ 216 automatic fish-hook setter ........... — backlash stop for fly-casting reel. ee creel keeps contents fresh ............. ... 607 easy method of scaling ..... jackevs ae fighting fish sport of Siamese natives. ais 190 fish learn to read alphabet .... ; ox fish lure imitates minnow... . 716 frozen and packed in cardboard containers : 5 lead sinker salvages snagged fishing tackle... 682 new methods keep fish fresh over ten ae. . 986 outlaws of the sea > ve pouch of pelican is used as net or scoop - . reflectors set in fish lure.......... 533 SE, FE I, brcincaccasscocceaccaaia 1011 stun fish with electricity .......... es | there is money in farming of brook trout. .. 808 water gardens for the home ease aa Flagstones—stone path adds beauty to lawn .. 683 ee, for the motorist...... . 685 Floors markers set in, guide passengers to trains. 800 steel, in skyscraper : Floor Drain—made accessible for easy cleaning 791 Floor Scrubber—electric, waxes and polishes..... 800 lowers copper container for cut..............0. .1017 may Wales Gems Fae. ....o.....cccccees . 812 wire holders for long- stemmed : bene 662 Fog—in front of autos lifted by exhaust air.... 460 Food frozen in containers preserved indefinitely 720 test meat cuts by tasting two thousand ae os wads ny eb ces bah 4 cere eked ee 768 Food Shop cast att motor bus serves as....... : 821 pay-as-you-enter, has automatic service...... 813 Fortune Telling—novel device for...... Se Fountain Pen—holder in cane... . ee Freight—load and discharge, from moving planes. 793 Fruits bottled without fermentation [Pia baa aa ae packing frozen raw ...... Pe eT err oe 215 Furnace codorus, cannon cast for Revolution ......... 545 hot-air filter on register protects health 49 how to install a gauge glass....... cost. Oe made of fireplace . - oe pipeless hot-air heater for small homes. iiaes 6 tool for cleaning ... e6 . 350 Furniture cutting the cabriole leg for........ , .1050 electrically heated knife to aoe [ova tekeae ae garden, gnarled tree roots for. — ~. GS individual drawer pulls for .................159 removing blue film on ......... - .1024 removing scratches on .................05. 333 G Gam es billiards and golf combined in coin-in-slot GE « ebdo sw ikwabenucerse ca i ° 898 Games—Continued bowling with a billiard cue................. 599 flag for horseshoe stakes .................. 158 Garage built of glass helps sell autos...... cnonemee ae floor stop for the Sakdtaeda'ts ineees 1046 handy rear-end rack Ds ch bn ctvad aceawmes . 877 a iced Lah ws wha bee ame arsed 692 radio device opens ‘and closes doors of........ 363 rotating holder for light cords.............. 696 swinging crane in small.................. 1045 Gardening gang- e plow hoe cultivates and weeds at same time ; hand tractor plows ‘and mows lawn.. 601 long-handled weed cutter epee | with one ME u ea Tools—safe holder for long- handled...... 859 burn coal in ground for...... Pree mouse better detector of, than canary. ere plants find plumbing leaks... bmn ae bea oe uninflammable is used to blast coal.......... 32 vapor-gas service for home .. 531 Gas-Engine—old tire prevents belt from slipping on flywheel , . : 865 Gaskets—renewing blown cylinder- head : 509 Gas Main—leak, located by plane ..... re. Gas Mantle—was invented fT er ee Gasoline better method of syphoning......... . 327 filter funnel strains out water ie theft from autos prevented by locking cap 682 Gas Pi flexible, made of aluminum... A 955 Gas ell—fire is blown out with dynamite. ; . 88 Gates farm, tin chickens decorate ............ one 2 simple support will prolong life of... . 850 Gauges graduated-rod ene gauge for hole measure- DE. des Ct ehdw nade ses bhue + dade canons 769 telescoping gauge measures. inside dimensions 767 Gears—made from cornstalks , a 383 Geese—fiying wedge adds to speed of wild. nae Ae Gems—blue, colored by heating , ... 465 Germany—packing plant electrocutes hogs ee Germs dyes for detection of, to be standardized . 800 electronic bullets destroy o : ae<co ae Glass auto-garage built of ....................... 754 cutter for glass “ate Sei Ba shee eed gidh ale . 350 decorating ... ee Heer eS 488 halls for exposition saee 81 house, eighteen-story, with concrete frame . 822 lost art of coloring sought in sun’s rays 985 radio broadcasts made visible by curtain of.. 956 removing scratches from . 860 simple way of cutting disks for pressure SE Konica vk on eiatwe ns De ew ate dn 695 skyscrapers planned . 79 substitute for is flexible and does not splinter. 356 walls offer privacy to steel homes cocce S19 Gliders college glider club teaches low-cost flying... 409 girls in training form Anne icamange club on West Coast ... 958 gliding school for women opened in ‘Germany. 424 Lindbergh learns to glide 6 529 towed by plane across nation ° ... 883 water, with wings tests rider's skill. ... . 719 Globe cf rubber is inflated like ball........... . 217 of world has index and gazetteer........... 183 Gloves damp, how to dry out ............. 686 identification tags for .............. ees save your sleeve gauntlets .. 25 Goats—ultraviolet rays for, improve milk quality. 583 Gold largest nugget ever found we one hundred ninety pounds ; 2 dacibaan ee reclaiming old, for sale to mint. See. the last frontier co OP RE e wae Vee --. 242

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mbeteR MONON GRINS... oc «cdc cv ee cc seswseese 583 automatic golf-club guide for short shots. 914 ball substitute for practice................. 174 brook on indoor course offers outdoor hazard. 366 cages on wheels protect practice-course NE ARE aki 5G a nhl a ree hd Be OHS 4.012 640 25 cardboard putting green for indoors......... 157 hog bristles in balls .............--++-.005- 193 home, practice target may be used anywhere. 809 larger and lighter Be S43 ck hbase SY ohe-s.62 225 mirrors on golf club head aid to perfect shots. 960 non-disappearing “‘ball’’ for practice indoors.. 903 small course provides concentrated sport..... 985 supporting rack for bag does work of caddy. 721 tee support provides target...........+-..-- 262 tees made from envelope tips..... » Bee Grader—rotary, levels land for farming purposes. 623 Grapes—larger, are produced by girdling vines... 767 Grease Gun—hold eliminates air pocket in....... 157 Greenhouse concrete potting benches for ............... 878 two useful ideas Seed sg sips ae Grinder—pipe caps make threaded arbors safe.... 163 Grinding—universal diamond-tool holder ........ 349 Grindstone—simple repair for ..............-+. 158 Guns fighting ships now outranged by coast guns. 24 glass bullets full of gas 2 ee AL ae 289 motorized anti-aircraft for the next war. 458 movies help find aerial range a 8 sae wae oil poured on waves steadies Navy’ ae pistol bullet spins cocoon in sheepskin coat. . 630 queer facts revealed about “Big Bertha”..... 712 shotgun has one barrel on top of other...... 615 why double-barreled cannon —— to work... 644 Gymnasium—electrified 5 Sk A See dose OOe Gyroscope Me pilots airplane ..........---sseseeeeeee . 278 top that spins a man shows effect of........ 358 H Hair : growth stimulated by fan and light rays..... 727 makes chemical important in diet........... 645 -Hammock—carrier in the car..............+.5+- 137 Hamper—attractive, easily made ........+.....-: 833 Hangar continuous-arch hangar has no beams or EE ab sa Fk k oe whe a5 nea sewacnes ee 58 eprinkler system im ..........sccecsscccces 181 ats sun hat held on shoulders..............-+.. 295 with transparent brim for sports wear....... 783 Haystack—easy method of cutting ............. 861 Hay Stacker—run by tractor 914 Heart—beats more than one hundred ‘thousand times in a day. : 33 Heartbeats—started by radioactive ‘chemical . - ‘one wae Heater I a iad she obese cnet eee 288 electric on faucet warms water instantly..... 896 SE, SES GE TMD nn ccccccccrnceese 846 for garage or workshop ...........---00-+: 692 UD sc edicccccecvacsascoees 714 gas, preventing condensation in eee barman were 672 Se” Per ree er TS 617 water, for sunny climes .............-.-6+5 875 Heating and Ventilating ave teenrsnreeeserscees 471 air-circulating fireplace maintains even heat.. 719 big burners speed up heating of kerosene stoves EE SP A eee ee 761 blower cuts down fuel cost ape eT oe 511 electrically heated bottle to supplant furnace. 757 heat radiated from walls by panel warming... 816 wall-register electric fan speeds up heating.. 776 Hectograph—made from old films .............. 156 Helicopter—make this two-propeller ............ 311 Highways—how motor highways are being beauti- fied 255 Hoe—gang- plow hoe cultivates ‘and. weeds at same ET a Oot e ee 48s SWUM oa ba wow od ORPES 775 oa for ringing SE ee Ree ee Trough—improved..................008 .. $26 ee DEED n.ced va vaveretveuderete 1021 POPULAR MECHANICS INDEX, VOLUME LIII, 1930 Homes glass walls ofler privacy to steel............ 813 lighthouse with spiral stair turned into...... 711 “The Fo’c’sle”’, a shipshape summer cottage. 842 of concrete and glass built for health 636 Horses—bucking broncho imitated with saddle and ie i RIE Yaa py: ONCE RN algae ae Horse Team—36-horse team ‘driven by one man. 318 Hose—rotating clutch grips without screws...... 532 Hose Clamp—hand adjusted is quickly insteted .. 993 — for glazing frames.............. 682 otel motor bus operated by, | reall adventurers... . 823 playground on roof .. since or House ‘ glass, eighteen story with concrete frame..... 822 resembling airplane moved on “landing gear’’. a visualizing proposed change in 08 Household Devices 110, 286, 462, 638, 814, 990 adjustable garment hanger ends contain moth- balls or crystals .. 991 automatic seal to keep air from blowing under oor 990 baby carriage “has built-in compartment for Phonograph ; : baby’s bottle, cup holder with “handles for... 463 breakfast set serves as china closet . 46 broiler automatically rr” out of gas range. 287 cake pan with hinged sides ... i a can opener that works right or left- handed. . 991 cleaning cloth, adjustable grip for ai ior clothes drier, "electric I 3 ig 0.) ,9,9-m . 286 clothespin has wire belt .. : Rc adeelinee aaa cookie molds and batter container . 110 cooking parchment for wrapping vegetables. 111 curtain protector made of oilcloth 990 cutter for preparing string beans. : . 991 dirt bag for vacuum cleaner more easily emptied double-door arrangement keeps. intruders from home Loatth, ten iuaaeriand a Ande bis ddlde's 6 es electric cooker Metanbrhhs tard exebeceveci ED electric iron holder vo dt aiepisbtht-are ess Aone 110 electric range, high speed . 111 electric tea kettle heats more rapidly than gas or electric stove .. electrically operated marshmallow toaster pre- _ s freer pensetits cnn 15 flatiron rest has raised edges on ae PE food mixer, electric ...............06 see ae footrest for any type of chair .. 639 garment bag has electric fan for clothes drying 4} garment hanger ..... 639 griddle Guar with adjustable blade. 5 -ecuhag ee hair drier, electric ........... atte 463 hot-water heater, electric .................. 288 ice cube container made of rubber........... 638 ironer attachment fits on wringer shaft...... 639 juice extractor rotates at ponerse. Ps metal shelf, reversible : ae mirror cabinet for bathroom. oe ere mop attached to broom ...............++... 110 mop handle ...... pone ee mop head fits on spring frame like glove — mop, scraper blades inside bucket clean -. 639 potato peeler that reduces waste and removes = 814 eyes radiator cabinet electrically equipped slips over CE Aig ct Rhee ti wadevendateanéas 814 range, electric is sectional ieanewxe o02e8tee Se safety sivainer kettle -. 287 sandwich board with well for chopping ingre- i elec adtidanheehen nahn svoed 814 shoe box with transparent end.............. 991 shoe rack, adjustable spoon is corrugated for grating foods dat orice 463 stool has step that folds into the base........ 638 OE ear aeacecctcteccensas 814 trousers’ hanger with drop Ms os aoe 463 vegetable and fruit shredder . ventilator rolls up like window shade. Keates 815 warm rug for baby . -«+ 286 washing machine operates ‘like percolator. 111 House Plans 1 352, 528, 704, 880 Humidifie-—and radiator in one unit............ 285 Hunting deer hunted from airplanes ................ 449 trailing animal gangsters oa. Ouhto ad oone fae Hydrant—extension for operating wall.......... 506 I In In Ir Ir In Iv Ke Kir Ki Kn Lai La

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POPULAR MECHANICS INDEX, VOLUME LIII, 1930 Hydroplane—motorboating and aying < a in Se ee eee 895 I Ice ortificiel, , cates rink accommodates thou- a12 ouue ost contains bag and “mallet os 920 dry, = ped filled with, — than North one dry, ol may ‘furnish 725 easy method of making .. 322 Icebergs—the iceberg talks .......+...---00005 19 Ice Bo SD TE GOP oct vac cedoccsnccccoveus 509 thermometer for ............ 182 Ice Cream—cutting containers 498 Ice Cream Stand—at wate 4 for F holding empty Se jseenes Sece 1017 Ice Creepers—easily made : . 509 Ice Scooter—air propelled model . 7 Illumination lighted sphere on building ‘ 71 over hundred floodlights operated a as one unit. 278 Incinerator—for burning refuse requires no fuel. 968 Incubator—cigar box protects adjustment of ther- mostat Fy SFR aT _ 690 Indian—solves problem baffling engineers. . 914 Infection—preventing infection from reer in swimming pools ...... ey 838 Ink Bottle—metal stand prevents tipping. ep 33 Inlays—simple, will improve your work 863 Inner Tube—prevents vise marks............ 868 Insects ant eggs as game-bird feed... 545 fan blows poison in ant-hill 217 gold from butterflies 410 hints on mounting ; 488 if we had the sense of ... 626 plants that devours .............-0..+0e0-s 253 preserving specimens of 145 radio waves slay insects . 295 tiny monster has million- dollar appetite. 782 winds by lights for hatchery... . 278 windshield screen for the car Prevents entrance one inate natin cn ht Cai R 783 Inventions ten cent store Edison........... ae the “Brain Wave’ room... . 578 Iron Conduit—quick method of cutting. caps rahe 1055 Ironing Board i i ns caddis tee esbsdeeevceet ee 321 CN Pe 6 nb c-0 0 54:04.6680. 66.0005 510 Irrigation canvas sheet diverts } See 0 ery 1056 A BE GUE os Fed cweeceeroeesceusees 377 , 2. ae rere 765 Se We ED Nive coe vc zetcccccevceseces 327 supeusee Gardens—built in western eatting 757 ewelry—secret hiding place for so Bae ee a the home shop ..... . 516 K Kennel—side rails in, save puppies 154 Kerosene Can—cleaning out caidoveteduhadue 512 Kitchen Stool—how to make a metal............ 335 Kites—sending aerial messages to 498 Knife containing ten tools ...................... 545 for tire shops made from hacksaw. a th Sin Oe 339 L Laboratory Stand—makes good workshop tool... .1046 Lace—designs are reproduced in rubber......... 200 9 Lake man made covers sites of six entire villages. . 886 mystery of solid salt at end of five rivers.... 717 iamge i CD down acons buesbaédese bee 858 making an old- OE aay pull made of wallpaper..... . 856 spring clamp for light bulb fastens anywhere. 757 Lamps, Health a simple sunshine lamp nines aa gives sun bath oondiens to eyes... 608 Lamp Shade—colored ads used to make braid trimmings for .... Lanqueass locks help teach children foreign ........ 240 typewriter has conquered many eben ae Lanterns gasoline, asbestos curtain for bbpeouaors 496 lighted, protect sheep +++. 856 magic, lets speaker stand before screen .. 807 Lathe hard and soft lathe centers. ..... sa de ee how to make a hard tailstock center... ... 339 outboard motor drives small........... . 319 Lawn burlap sacking protects seeded terrace from washout long handle on grass shears makes work easy. 768 Lawn Hydrant—cement drip block saves. 879 Lawn Mower makes good truck am ddng ibd ‘ . 322 rake attached to, saves time and work . 851 sharpening a . chen ase 1049 Life—strange circle of, is revealed under micro- scope a6 ° sabepe eos 992 Lifeboat for plane rescues n2+Besecseus, safe launching assured by skids... : 615 Lifeline—to escape from fire josce ae Life Preserver—air tubes in sweater make it” Sion Se Life — catapult fires buoyant ball to drowning persone 356 self-filling vest keeps wearer afloat 602 safety suit like “coveralls’”............. seen $99 Light artificial, for wheat matures crop earlier..... 729 beam of stops train when signal shows oo oe clamps on dial phone illuminating aahes . 761 measure for is found .. oe ae night scene at Monte Carlo shows beauty.... speed trap for the earth races light beams... 450 switched on by radio 10,000 miles away 912 trolley pole flash is basis of fog signal tests.. 775 Light Fixtures modernize your ... =e 1028 movable add beauty ‘to homes. 119 Lighthouse—with spiral stair turned into residence 711 Lighting auto grease pit illuminated by indirect : 720 ballroom transformed by magic changing of color inc tndih edes Wand acres sah be aie ae 776 color organ paints ballroom with magic light. 401 Lightning how safe is flying Te 1 pictures of, taken with automatic. camera soe the hazard in flying .. 359 Light Post—bumper protects from auto assault . 713 Line Current—test for Gintinguiching A.C. and D.C. current : ; «.. 700 Linoleum—making good restorer for. .. 862 Liquid—solidified is hard and flexible as paper. .. 448 Locks door, made from old strap aman ere 489 selective lock for icebox....... epbbadetds 509 Locomotives compressed-air Diesel engine .............. 431 has streamline boiler : 383 liquid air used in shrinking steel pin on rive: WE casdeensascesese miniature for the ‘boy PPO T Ee he Ee 155 steam muffler and soot blower for weotnveén Ee when horses outran the first..... . 398 Locusts—fight, with flames used in world war. . 953 ir AB he: aerial view of a gigantic lumber raft......... 79 jam of, for underground ............. 449 Loud Speaker—electric eye works... . 417 Lubrication—keeping trolley wires ‘free ‘of ice. .- $83

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10 Lumber “alligator” Ap climb hills and haul...... ,- 609 over half of U. S. is being wasted......... : ae should be stored flat ... Picececehee ae Me straightening warped boards” HAPTER PSF . 499 M Magnetic Eyes find cause ot mystery air crashes...... ioe ee Magnetism—hardens metals . Vatnweicd ae Mailbox—miniature house makes novel 1033 Mammoth—how prehistoric man used the “killer .. SCOTT Ce Manna—of the bible is found to be "desert " shrub 600 Manuscripts—restoring writing on old........... 695 Maps city guides on lamp-posts have steel leaves.. 471 roll, for airplane pilot attaches to wheel sae tests skill of auto drivers ayer ee Marble a cleaning mixture for eee ee 1025 wire used to cut ...... . 754 Marshes—plant builds new territory by filling. . . 723 Matches SOC ETE. COTTE TT 928 shellac for waterproofing a 685 M ing Ins Str graduated-rod wage gauge for hole measure- ments SEANCES OD V ob 00.0 0.40 500s 6.0 eRibekes 69 height finder ...... 283 telescoping gauge measures inside dimensions 767 Meat effect of exercise on to be shown in tests..... 56 steaks from the arctic............. .. 354 test cuts by tasting two thousand samples 768 Medicine—watermelon seed is remedy for high blood pressure ‘ 265 Memorandum Roll—for de sk phone. Oe Mental Test—babies given SRS 22 . 415 Metals lead alloy more efficient than pure metal.... 363 magnetism hardens ......... jens man-made mystery metals Per ee ae a 402 new way to finish prolongs life of. 884 prospectors discard metal costlier than gold... 240 restoring luster to tin ° . 860 spark-plug alloy maintains constant "voltage 544 steel-hard copper alloy made into razor blades 896 the world seeks new Eldoradoes........... 74 tin gives strength to bronze......... se sea ae tin in bells softens tone........ ee 623 tungsten carbide goes up in value. 540 tungsten carbide is hard eee to scratch sapphire See venceeeedese . 559 zinc-base alloys improved ‘ .. 416 Meteorology—sixteen million tons a " second. oe 266 Meteors may menace planes SE a mine shaft is sunk to solve mystery. ; 40 Microbes—cannibal, in water shown by microscope 288 Microscope aids in restoring rare paintings...... : ae fossil plants furnish art designs............. 980 heat filter for, aids nature study..... .. 994 most powerful opens new world............. 112 reveals strange circle of life ; cooae Dae wood structure provides dress designs ‘o_en 816 Milk radio installed in cow barn increases supply of 954 ultraviolet rays for goats improve quality 583 Milk Bottle—metal band for, shows age of con- tents . wee 635 Milk Tickets—calendar holds .......... 598 Milk floss used in life caving and play- ground equipment 890 Milling—two shafts milled at one ‘set- up ocioe Coe Minerals—the world seeks new Eldoradoes... ... 74 Mines and Mining mouse better gas detector than canary..... 73 rope stretcher aids rescue work in mines . 765 unique Mine yields gold, silver and quicksilver 72 Mirror—on golf-club head aids perfect shots... 960 Miter Box—improved on sawhorse 161 Models—miniature railway provides instruction and Pn” kan ebeet hee es snes ste 534 Moistener finger, fits hand like a wrist watch.......... 645 fountain, for desk replaces sponge.......... 559 POPULAR MECHANICS INDEX, VOLUME LIII, 1930 Money—the world’s greatest treasure cave 34 Monte Carlo—night scene shows beauty in lights. 721 Mortar—for brick walks... . ; . 675 Mosaic—of bible story takes years to finish. mae 90 Moths, Fruit—molasses lures..... a Motor easily moved from one machine to another 1043 outboard, now equipped with electric starter.. 967 outboard, twin fires on alternating cylinders. 207 quiet motor for airplanes saves — -. 775 run by waves of sea ....... jonscee Ge Motorboat has stern drive and reverse gear............. 777 slip-float contains bungalow ae Motor Bus—cast-off serves as a lunchroom ...... 821 Motor Cylinders—pulverized coal burned in. . . 822 Motor Truck has three wheels ... cotanyohe ee traveling electrical ES ERE RR Mountain—when the, moves 763 Mountain Highway—has mile tunnel with five + gal- leries .. , , : . 926 Mountain, Stone—radium in RS yee 717 Moving Pictures ancient China had talkies ... 609 beauty culture taught with talking movie oe feeding the news reels .. orice ae films are preserved in special container oses Oe flickerless use multiple lenses nnney 800 help aerial gunners find correct range. ee home, seen in daylight oe heee t ah ie lights rule mob scenes in talkies cas ae lions are filmed in their native haunts....... 632 mirror for amateur movie kit ‘ — new giant ‘ ‘oo ae noiseless shoes and jewels for the talkies..... 728 on passenger planes ‘ - 132 pictures turned into speech may aid deaf ‘ 6 portable movie projector has built-in screen 432 portable sound-movie outfit........ sane Cee tr cand» ino, MEO “ha ee taken in silhouette for radio transmission.... 279 talking movies for home... : 407 Murals—saved from mold by poisoning fang. -- oe Museum—windmill converted into. 729 Music accompaniment for the player piano marked on music roll... ; 835 printer requires no engraving ; Seta at ak 725 visible sounds reveal the secrets of.. ee Musical Instruments guitar, keyboard on neck of ............... 454 xylophone like a pipe organ ae Re 355 Mystery—can you solve. ; . -. 948 N Nail-Polishing Kit—for mending celluloid articles. 1036 Navy, German—fighting = now has coast guns Navy, U. battle ficets steaming south for maneuvers... 900 “big ones” raised for long-range firing... 899 “dogs of war” bark under cover of darkness.. 902 first of “Treaty Cruisers” placed in service.. 758 long-range guns roar during battle practice.. 901 torpedo controlled by radio - 262 Necktie—mailing tube removes wrinkles | Necktie Rack—in chifforobe Lae nee 1011 Needle—easy method of threading 489 Newspapers—old, sold to orient for wrapping. | North Sea—plan to drain for more land 975 Nuts fuel oil from wes cuieedaee ewes 432 removing a tight .......... a re 347 tool for starting ... ‘ea ‘ .. 700 Oo Oats—cat hulls and hard rubber make tough ma- terial . eb 207 Occupations—queer listed by census officials . 614 Ocean—when the ocean floor quakes ‘ .. 618 Oceanography—sound ocean from Zeppelin. sees oo — upplies finger moistener fits hand ............. ... 645 fountain moisténer for desk ....... mane o- oe Of Oi Pal Par Pag Par Pas Pat Pea Pea Pen Per Pes Phz Phe

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POPULAR MECHANICS INDEX, VOLUME LIII, 1930 11 Office Supplies—Continued hand-operated duplicator makes stencil copies 784 Oil art of ceramics latest aid to search for...... 647 chemicals in oil-field brine... . cbs ae electroplates surface which it lubricates awe ae floating oil tanks ... beein fa.0'4 e203 from nuts used as fuel...............-.---- 432 from sand 633 of roses, fifty thousand buds required ‘to make one ounce ... 119 oil spreader for seaplanes smooths rough water 919 poured on waves steadies navy’s big guns. 726 steam shovels salvage ........-....+-- 382 vegetable, bacteria extract “plant oils doing work of presses ... ‘ 999 Oil Burner—and _ boiler combined in a cng unit. 39 Oil Can—spout fills shock absorbers.... ae 315 Oil Container—for tempering ... Sain wc 868 Oil Drums—rig for spray- painting of ; 701 Oil Fields—electric lighters in oil zone...... 63 Oil Gauge—handy wiper for ey . 498 Oil Holes—blowing chips out of. 515 Oil Trap—simple method of trapping ‘oil in loose n° Scbakhvsbensdaes 45 Oil Wells , rubber doughnuts solve oil-field problem..... 600 . underground camera shows course of ; 8 Opera—the magic wand of the re alk les 202 Outboard Motor—speed indicator for ........... 496 Oven—for high altitudes aids mountain cooks 975 Oysters cradles said artificial culture haeadaee 726 “noisy” heard by ships peiream oe 559 Pp Paints and Painting boat paint made from dry-cell tops... 348 cover spout for pouring paint from small cans 680 durability of white paint. ; 674 electric spray saves time and paint. - oo 628 how to paint spruce siding er 1017 how to repaint venetian blinds. ... 684 how to stipple your own walls.............. 316 nails for mixing paints cece 702 paints stick best to wood grown in spring 635 plaster walls require special care in os 668 preserving paint .. 313 relief decorations with ‘stencils iputketie 135 rig for spray-painting of oil drums owes 701 shellac from old derby hats ‘ ta< 280 softening hard pigment in paint... 1016 staining hint to match light wood work 1033 staining wicker work .. . 683 Paintings oil, method of restoring .. 350 rare, are restored with aid of microscope ote O00 Palestine—size of 553 Pans—emergency angel- cake tin ti 1011 Paper—weighing with light ................ 634 Parachutes jumping into fame ... wand . 234 opens instantly as it clears plane rr 713 Party—table favors made of fruits and nuts 1026 Passion eee most famous, at Oberam- err ey re , ayers 803 Patents applications for radio 634 on plants and trees same as for machinery 712 Peanuts—new uses for, found in many by-products 279 Pearls—injured by cosmetics sent to jewel hospital 997 Pencil holds rol! of paper for memoranda i twin, saves time in copying...... 346 Perfume—the French industry is valued at $36,000,000 a year......... en 56 Periscope—adds sport to “war” games ‘ 1027 Pests fight locusts with flames used in world war.. 953 molasses lures fruits moths -. 903 tiny monster has million- dollar aor. 782 Pewter—methods of cleaning ‘ 686 Pharaoh—heart proves Bible truth ees ceciaes 184 Phonograph in an end table connects to radio...... 193 new disk has long life ° Tes records, why used needles damage. oe. Phonograph—Continued on %. a eer ee ° 232 Photo-Electric Cell as automatic fire extinguisher .............. 717 may run motors ‘ 891 robot’s electric eye controls chemical Process. 454 weighing paper with light 63 works speaker welcoming visitors sr (C, —— statuettes easy to make.. 836 Photogra pa photos at three miles a minute en arrangement for regulating epereenete of chemical tanks , . 879 blocks to raise photographed objects. , . 351 distilled water in preparation of solutions. 327 dull prints made on glossy paper ‘ 862 electric eye marks photos for best print paper 366 ferrotyping kinks save time and money 1055 film for color snapshots... 95 flash gun operates camera shutter release 601 floodlight. for the amateur photographer... . 171 homemade trays for ... . 685 how the camera man got ‘his masterpieces 646 intensifier for negatives . 144 lens shade for beach . Sudan Restate - 673 negative and print drier o- — | paraffin covers for trays prevent evaporation. . 1036 photograph on metal plate in broad daylight 433 photographing silver cups 4 . a7 projector aids in catching of fugitives 778 shooting wild animals with a camera 58 substitute for focusing cloth. ... 841 ener Aerial aerial view of Mt. Rainier dines 96 flying over jungleland ....... 177 golf score cards oc SEO pilot takes photos with one man ‘camera. 65 Photography, Radio—photo of British ae comes by air 14 Photography, ne 9 window of giant tube 46 Pianos carried on horseback .. . 107 notes are prolonged by electromagnets. . 719 player, accompaniment for, marked on music roll ; 835 typewriter built into piano transposes music 802 Picture Frame—glass should be fitted loosely in 174 Picture ae enone cordhcard septaaee ply- wood for . 034 Pictures magic lantern lets speaker stand eaten screen 807 wallpaper protection behind . is ae Pie Pan—that does not spill juice 560 Pier—telephone pole forms backbone of.... --1016 Pillowcase—vacuum cleaner fills 315 Pipe Connection—repairing leaky peteest or. - 1056 Pipe Coupling—emergency 868 Pipe Line leaks located with war instruments........ 802 on wheels is towed to sea by tug 977 Pipe Organ—for the home resembles grand piano 375 Pipes alarm when flow fails ve ere 262 pipe-marking tool oes 171 stopped-up, cleaned by shaft. on drill 647 trench box speeds up laying oe 513 water, emergency repair on burst ee 1045 Piston Rings ressing down .. ewes errr: grooves, quick cleaner for ‘ ° 862 Piston Rod—good swab core for...... - 1049 Planer—angle plane for a ao a 694 Planet—found by microscope on photographic plate oad . 968 Plants find plumbing leak by reaction to gas. ke 599 fossil, microscopic, furnish art designs. 980 gigantic elephant’s-ear leaf ; covoe San how to destroy insects on house plants 680 incubators for baby orchids save plants 998 lifting strength of, measured with weights... 913 seven years required for orchid to mature.... 409 that devours insects . ae the gourd is one of the oldest cultivated ; 78 wire-screen enclosures protect 515 wonders of unseen world revealéd by lens 631 Plants and Trees—patents on, same as for ma- chinery ripe 712

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12 ’ POPULAR MECHANICS INDEX, VOLUME LIII, 1930 Playground above streets for congested areas ........... 447 on hotel roof for golf and tennis............ 448 Pliers—grip without slipping on round surface... 208 Plow guard block keeps free from rubbish ........ 347 rotary, tosses snow from roadway ........... 560 Pool—of heart shape for garden is easy to make.. 685 Population—daily changes shown by machine. 109 Porch Columns—preventing wood rot in... <a Post Office—dead letters cost millions annually. .. 408 Posts graduated auger tells depth of hole...... ... 849 preventing fence posts from rotting......... 859 ND Nedwed ceavsccsycvueceseve 1045 Potato contains seventy-eight percent of water...... 94 hollow spots detected by candling...........1042 were introduced into New England from Ireland vember’ ca Vain 4 eas ee Potato Sorter—for the farm.................0.. 1048 Pottery—decorating Se eS ee eeeece tees 488 Potting Benches—concrete, for greenhouse eer 878 Poul five-story chicken hostelry .........+....-+- 407 sunned yeast fed to chickens .... o< wan Power Line—upright pole tied to truck bridges. Power Plant cooling tower like big milk bottle........... 201 electric, wind-driven auto generator makes... 348 Preserving—fresh liquid fruits bottled without fer- ere ° 91 Printing border slide rack for printers .............+- 336 stone slab found in China ... 256 Prison—box seats in prison school help keep order 801 Prohibition—‘‘hides’’ for leaned test skill of detec- Ra RE es eo 616 Prospecting it’s easy to locate hidden metals............ 824 the last frontier ............ vee paahhebhen aa Psychology difference in human ability ................ 65 experiments indicate thinking involves muscles 984 19 hands related to tongue in stuttering test. ; 0 how you can cultivate super-normal senses.. 536 left hand found the best “eye” for blind...... 8 “stunts” show way in the choice of a career. . 538 Pump Tank—faucet on Ae Pe De Re eer © 489 Punch Press—spacing fixture MRS. Shoe 5 43 174 Purses, Coin—of rubber uninjured by water..... 920 voy : or filling nail holes ethene 495 for glazing hotbed frames .........-.....+-- 682 R Rabbits—danger of altitude flights proved with... 32 Race—automobile races with horse over wee. 946 Rack, Wire—for small stamps............ .1049 Radio across the radio bench ................++. 302 aircraft antenna shielded by fire partition.... 753 building a capacity bridge................-. 132 combination set tester TCE ee CL PT ELE 304 detecting interference with a street a 828 helpful hints from the radio laboratory 130, 478, 654, 830, 1002 how far will'a signal carry ......... 48 light switched on by, ten thousand miles ‘away 912 pilot’s helmet has headset for radio reports... ee sectional type radio tower ..............+.. 56 smallest headphone for use of pilots......... 78 soldering flux, homemade ................. 484 S O S saves whalers .. big wan ste otico ee time switch turns off power Saeed waedes Oe 903 ultra-short waves for PE RE a otke CoRR ee as 407 using ground as Senay ¢ antenna ae eek . 832 We WOME BOWS OF. 5c. a ce ccccecvecss 50 Radio, Aerial change-over switch for “Zepp’’ antenna...... 129 clock combined with aerial ae re 559 faulty lightning arrester causes trouble...... 123 furnace pipe acts as [aa k des ctew ¢s cose Se solving the omemneane house antenna........ 128 steam-heated ... ° Se , ete PROMO TRE OS... ccc csc cccceccsccce.» GBS Radio Aageien—ohet in improves tone of any Hen dhe Comoe hecsed brs os eed 1000 Radio A AE “coffee grinder’ dial makes tuning — : on NS 5 6 ta vas 6 cn's og 998 connector plug for power packs............ - 305 filters, homemade power-line ............... 827 lightning arrester does double duty. adeces ae new screen grid unit Pci psaveeesuseusadns 299 new unit eliminates line noise............... 301 shield has removable cover ‘ Tee, simple set for making continuity tests ee S-W transmitter uses low power............1005 wavemeter for short-wave sets.............. 656 Radio Application individual called by radio as easily as by Leanne 43- 824 it’s easy to locate hidden metals Radio Batteries caring for electrolytic B-power units .... 298 individual B-battery for detector plate....... 129 protecting insulation on wires ee eC simplified connections for charging j 484 Radio Broadcasting—made visible by glass curtain 956 Radio Construction kits for set builders : 480 subpanel for supporting heavy radio parts :1004 Radio Eliminator first aid for the electrolytic B-eliminator..... 133 stopping A-eliminator hum . ao 304 Radio-Ground—wet, new device provides a a. . 483 Radio Installation avoiding wrong connections ta er Wa deca 1004 make good filament connections Seeus . .1007 Radio Loud Speaker built-in dobamaie uses wall for baffle «0 ie corner baffle for dynamic.............. v4 301 employs corner baffle Ragin. decane covee for auto gives volume Peak da het . 982 horn made from cane fibers isch anedesks 476 improving tone of your dynamic.......... 649 tapestry picture is condenser speaker........ 483 Radio Receivers A. C. demonstrating .......... ivavsebae Ge an efficient crystal set ios sa+se Ge converter for operating A. C. sets from farm lighting plant i ; Scecerne Ge employs new methods ‘ itcveene ae filament supply from 32- volt source........ 305 for airplanes now in demand ...1008 for automobile is shielded from car “noises ‘ 989 how to install a radio set in your car Be 124 installed in cow barn increases milk _ Supply . 954 neon lamp as a test device. . 13 new settings for modern whesivees 306 portable set epenntes on A. C. or D. bod cur- rent . sceden eee 299 reducing hum in ‘A. c. wetness acwrdlelans 651 remote controls for operation 477 simple instrument brings your set to bee notch efficiency ES e 652 ten feet high broadcasts speeches. Hine Ke 447 Radio Reception fewer sunspots to give better ‘ 384 heat in insulated box makes radio trouble free. 134 new unit eliminates line noise......... 301 noise is reduced by special filter. ... 540 radio on car is improved by plug ‘resistors. . 946 separating interfering eee 832 “totem pole’? mast improves rere. visual interference-indicating MEME occeyee 1008 yardstick to assure better ....... 7 433 Radio Repairing—soldering iron permanently et Fa ae ae aera 299 Radio Shock Absorbers—end vibration ......... 793 Radio Static—to be forecast like the weather..... 727 Radio Television at low cost now possible Tr .. 300 receiver which throws pictures on mirror. 199 Radio Transformer a practical homemade power ............... 472 protecting unmounted ‘ Pecadce Ge universal-voltage filament transformer ewer 120 EE, Site ids wig bide ceaeewtee dace 829 Radio Tubes checker, combination A.C.-D.C. tube....... 481 “pentode” give more power ................ 781 removable filament reduces cost ........ oon Oe screen-grid unit ay ae Rowe sOudces 658 rose Prerer rrr ree 1007

Rar Rat Ray Raz Rop Rub Rug

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Radio Tubes—Continued POPULAR MECHANICS INDEX, VOLUME LIII, 1930 tube-base plug-in coils .........6+....+4-+-. 476 type, 45 power, using ............-.+ee.4+- 480 Radium “bomb room” for radium = bes one CN, st otnn eee . 980 cheaper seen in new process Phedenadneadaes 976 in Georgia mountain nas tracks of invisible rays seen in magic giaes .. 601 Railroads beam of light stops train..........-..+--++- 553 compressed-air Diesel engine ... . 431 concrete car made on steel frame. 634 fewer persons ride on train ... ~> B98 high-speed locomotive has streamline boiler. 383 markers set in floor guide pasengers to trains 800 model railway provides instruction and fun 534 moving cars are spotted from pit under track. 945 pygmy + aon and rail auto on nine mile _ 983 rail =. ‘kept tight by ‘molten metal spray. . 447 pant ving chairs increase day-coach comfort. 79 talking-movie show on train Sina: uae train passengers screened from road dust..... 14 trains with glass which ultraviolet rays pune ere 427 when horses outran the first locomotives 398 Rain Making—machine makes thunder and ae 7a ese? 586 Range, Electric—two- plate contains drawer oven.. 784 Rats—ferret farm breeds animals to exterminate.. 424 Rays, Light—growth of hair stimulated by....... 727 Razor Blades clothespin made into holder for ..........+.+- 334 how to preserve edges of sopeeus te machine grinds hollow edge on safety. _ 455 made from steel-hard copper alloy 896 Razor, Safety—makes tool for skinning wall paper seams . - 866 Reamers—holder simplifies grinding “shank 514 Reaming—kink for reamer | AMdets ance tagaee 694 Reisigeration food frozen in containers preserved indefinitely 720 truck keeps its contents cool as it travels 44 Refrigerator—toots horn when gas leaks......... 7 Rifles emergency repair for broken sight 681 sight is improved by reversing , : 850 River—moved over two miles to nena channel 992 Road Drills— ‘silent” reduce construction | noise. 644 Roads abandoned trestles turned into auto roads. . 284 making speed on muddy 669 sand spreader for icy ° 634 seismograph picks best road 374 Robot electric eye controls chemical process .. 454 electric, guides plane without aid anne 365 Rockets—the race to explore outer eee. .. 386 Rodeo—ride ’im cowboy ee *. 906 Beet Wrule—demproved .... 52s cece cscs cece 681 Roofing aw roof tile is cellular 206 oiled twine seals corrugated-iron laps. . 346 that resembles tile has slate surface. . 793 Roofs a cooler for 471 holding tar bucket on 835 repairing felt .. ae 878 Rope—anchor, of fiber stronger than chains 450 po Be Fastener—for towing requires no knotting.. 898 and oat hulls make tough material.......... 207 and rosin make compound for many uses..... 856 bands help to ~~ threaded parts.......... 858 cleaning articles OP carat VOvediul + <onewsous 158 “doughnuts” solve oil-field problem a wbGie’ 600 hard center rubber heel Roa hede o® . 427 lace designs are sepetuees | in 200 EE obs aw ewrbme swouiaeens 592 replaces metal che “a 369 sponge, has variety of coc ckeued 813 Rugs beauty is woven into — from games roll patterns ee oe 376 2 “yaaa ink stains from ........... 510 uss building like war-time tank houses factory... 778 warning for lazy workmen atop factory...... 592 s

Safe—‘“‘listens” for burglars ................. 207 Safety Devices and Measures air tubes in sweater make it a life + 913 arrow safety light for car indicates turns. 18 cage ladder for sign worker ee 625 checkered coat for worker guards coven ac- cidents . ; : 390 coal mine safety ‘campaign 415 for sewer-gas traps ths ode ae naee 851 lifeline to escape from fire 533 reflector gives signal of car’s approach from side street ee rope stretcher aids rescue work in mines..... 765 an glow at night to stop accidents 285 mine beneath Detroit, Michigan 577 ME OE Ek. oa bic rcs cadence 717 Sand OE Ree ee 633 spreader for icy " roads 2 ke ea 634 Sander—power, for the workshop ea ; 345 Sandpaper—soft rubber is useful as pad for. - 171 Sandpaper Block—rubber cushion for ... 1053 Sanitarium—solarium for patients 190 whorse—improvised miter box on 161 Sawmill—one-man, for farmer 460 Saws and Sawing qutemetic on saw-handle lock ............... 415 handy four-in-one hacksaw tos 2 hardening hacksaw blade to cut tool aut. 690 —e electric ripsaw .. ; Apes 593 restoring crippled circular saw ... 05: Scaffold—has automatic safety locks.......... 853 Scales tell weight in secret on radio dial drum 960 triangular, magnifier is easy on eyes 896 Science ‘ artificial bacilli aid story on origin of lif how tricks of upset many tt ideas 602 Screen Door—separate exit for children in. 851 Screen Holder—roller skates for 701 Screen, Wire—cut and rolled by automate dis- PP Anas hekueyk en's 24 Screwdriver y ow to prevent from slipping fro ratchet with lever te a J a =e M3 ee ee prevents slipping 783 sidehold increases 1 a. everage 871 bright finish on threads ; 703 lens-board, spring clips hold ... 877 rusty, removing from wood 874 template for fillister-head......... 673 vise used in driving Sian kee rere 527 Sculpenre eae Yashington’s face is carved in mountain a9 543 wire and wood resemble caricatures 394 —— light and battery....... 192 at: portable padded seat for stadium ; 56 ox, in prison school help keep or ee ( Seismograph—picks best road -" - rH eens 512 ewer—safety measures for sewer- Sewing Machine as traps , sa repairing bobbin winder of 145 DT IRCES SamiigoG ses thes <a ce 506 Shaper angle plane for : 694 makes good miller 870 you can make 687 Shears electric, cut cloth and sheet metal 254 long handle on grass shears make work easy. 768 metal, hand operated for heavy oy work... 979 Sheep—lighted lanterns protect sent 856 Sheep Shed—storm-proof door for 350 Sheer Metal—parts made with vise dies. 170 Shellac—from old derby hats vides béenae ee 280 Ships and Shipping a floating factory... ome 2 ‘Atlantic blue ribbon ‘sought by Canada. 625 automatic course marker for ° coe $87 “Britannic” England’s entry in ocean race 395 British aircraft carrier mother ship for air- SE wekeneesaedey

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14 POPULAR MECHANICS INDEX, VOLUME LIII, 1930 Ships and Shipping—Continued clipper ship at Sydney, Actrelin, into flats ; converted course and distance finder docking the world’s greatest liner S. S. “Majestic” Nin RT GE ere floating oil tanks ..... how German liner “Europa” ‘gets ‘record- breaking speed illuminated arrow directs other vessels : liner model steams through crowded harbor. . “noisy” oysters heard by .. - salvaging of the ““Muenchen” sea rovers battle derelicts > U. S. enters race for blue ribbon of Atlantic. wet loading aided by huge canopy ‘ ; Shoes hard center rubber heel inflated, for walking on water noiseless, and jewels for the talkies removing grease spots from repair for linings mes repair for torn linings soles made of auto tires oe Shooting Gallery—sparks in place ‘of bullets Shop—two space and time savers for the.... Shovels big, and why power, lifts tractor from barge ‘to ship. . Sidewalks attached to logging train io inp osbAiel ac delaras mosaic, in Lisbon, Portugal moving, may solve rapid-transit problems ns cage ladder for worker insures safety daylight, for trucks moves by suction novel sign post for home owners Silhouettes—painted on shadows Silk—from the air és Silo—trench used as bal eat Jee Silverware—removing dents from vere Siphon—simple way of starting Skating electric lights frozen in ice thrill skaters on skyscraper roo steel toe cap for skaters. Sketching—paper roll for Skiing—is great sport oe Skylight—roller shade for Skyscrapers disguise their chimneys future fortress of health has theater on fiftieth floor hundred story in many colors built of terra cotta mooring mast on roof for dirigibles new signal system saves lives on of glass planne Siatl skating on roof of steel floors in ; the Chrysler tower Sled—toy wagon is made into. Sleep—automatic camera reveals how you Slide—rollers on surface of save children’s clothes ; Sling—carrying and lifting for bulky articles Slingshot Pistol—combines two toys for boys Smokers Accessories cigaret roller electric lighters in oil zone » metal frame with spring top for cigaret pat windshield for the cigar lighter Smokestack—rifle and toy balloon solve engineer- ing problem ; : Smoking Stand—of real utility Smuggling—tricks of the smugglers Snakes—about two hundred and fifty kinds. of, are poisonous .. as Snow—tossed from roadway. by rotary _ Soap—holder for cleaning small parts Soil improved by heating used for insulating Solarium—for tuberculosis sanitarium in Hungary Soldering clips hold seams while handle for holding .wire solder improvised lamp ‘ South Pole—who owns the "Antarctica. Spade—with folding handle convenient to carry on touring trip : 694 253 625 1025 430 783 190 874 349 163 588 847 Spark Plug Cleaner—removes carbon quickly..... 769 Spark Plugs—terminal clips keep wires intact.... 710 Spectacles higher hinges give better vision........... 884 hookless ease pressure on ears mS 924 quick repair for ae a 489 Spies—the strange adventure of................ 442 Sports a hunt for future champions...... vite 603 steel-toe cap for skaters tnvenas . 200 world’s greatest arena ...... +9006 6ese ve ae Sports, Water greased-pole contest 577 motorboating and flying combined in water- plane .. ee scooter propelled ‘by ‘foot- operated oar.... 457 surfboard riders puncture balloons aeWa 559 Sports, Water—skiing is great sport a 490 Spray Gun—electric, saves time and paint . 623 Spring Hanger—used on air tools ieiess aks 865 Stage—puppet show for the home............ 263 Stairway—homemade disappearing + Sa Star—twenty-foot electric, shines on entire city 56 Statuettes—attractive, easy to make .. .- 836 Steam—sun’s rays run steam plant ‘ 72 Steam Engines high pressure to save much fuel...... 886 toy, whistles for ; , Sue 326 oe Shovel—salvage oil seed - ' 382 how to caseharden 1026 “nutcracker” tests metal for bridge columns 602 tempering long and narrow pieces evenly... .1044 Steel Balls—for flaring ends of tubing......... 869 Stencils—relief decorations with . 135 Stepladder—crosspiece on protests windows 513 Stock Tank noel ailing ; : ae oe ae Stone—and cement cleaner ; . 849 Store—on wheels expands when parked jinne Stoves hard-coal, converting into a soft-coal burner.. 675 kerosene, big burners speed up ne of. 761 oil, improving the cookstove . 497 tourists, heated by exhaust gas witli ans @ do Straining—cloth used for. 683 Straw—fireproof walls of for building material 407 Street Cars detecting radio interference with ; er lubricant for trolley wires oh . 583 moved on truck when axle breaks - 294 noiseless track for, is economical 980 open shelters at car stops .. ‘ 585 rails increase in size and weight. . 946 Street Spee enrvies truck has extension | orm ‘ ‘ Streets—oil removed with steam and brush.... 447 Stuttering—hands related to tongue in test 190 Submarines new safety devices ‘ eee cee 428 seamen to float to top of tower on 978 sound waves to locate .. 97 telephoning men trapped in sunken 792 Sugar from cotton . ; 881 liquid, flows through pipe lines ce aoe Sugar Beets digger operated behind tractor plow 792 dried by hot air reduce sugar loss i -.. 988 Sugar-Cane Planter—travels fifteen miles an hour 785 Summer Cottage—‘The Fo'c’sle’—a shipshape.. 842 Sun lost art of coloring glass sought in rays of..... 985 thrills in search of sun’s secrets. . 391 Supercharger—water-cooled, for front wheel drive 455 Surfboard riders puncture balloons in water game 559 sea horse on tests rider’s skill. .. 355 Surgery maggots fight infection in wounds. 457 operation shown on screen aids students 42 surgical dressings of wood-pulp.. . 358 Survey, Geodetic—when the mountain moves 763 Swimming—-self-retrieving cable slide for bathers. 848 Swimming pete—greventing infection oom chem- icals in Swing tandem . 1009 whirl-over for children. = 415 Switzerland—hydroelectric power developed in.... 433 Ta To To To

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ur 785 842 = \ POPULAR MECHANICS IN T Table and tea cart combined .. acs abate aac building drop- _ Queen Anne 1022 folding camp, for holding cooking utensils... 849 handle for extension .. .. 674 Table Favors—made of fruits and nuts ...1026 Tampers—for feet do work of lawn roller. . .. 496 Tanks chemical, arrangement for regulating semper ture of ... 879 compressed-air, ‘improved drain for 1046 oxygen and acetylene . cies 867 test divers’ suits under air pressure - 417 water, has sunshade to keep water cool for SN b6 40.020 .10 Tanning—postmen’s shoes help find best 919 Tar Bucket—holding on roof.... kee ee Target _— golf ractice, may be used anywhere... 809 sparks in place of bullets show hits 414 Tattoo—removing marks is task for doctors. .. 464 Taxis—furnishes music for passengers 553 ee to pravens seers hand while fill- - Dienaig~cetes messages flashed across Atlantic 767 Telephone efficiency is cut down by heat 80 light clamps on dial phone illuminating numbers ; 761 memo roll for desk phone handy reminder ... 791 rubber base prevents sliding ie ie Se ship-to-shore link proves a success 367 “talkie” to replace phone girls telephone men trapped in sunken subs. ...... 792 transoceanic system links twenty nations 960 users see each other as they talk .. 892 using Braille system for the blind in Paris 898 Telescope homemade, built of auto axle and iron. 180 world’s largest reflecting ... 272 Deleeiteneeagnene users see each ‘hem as Quy a Tempering—oil container for , % ‘ 868 Tension pcian gutting in place .... 514 Tent collapsible ridgepole for , 860 hookless fastener for . eee aaS 862 Theater audience to revolve around circular stages 988 has four movable stages . 425 light on chair back shows vacant seats a movie, travels Holland canals — the magic wand of the opera ’ coe ae Thermometer—for ice box ac an Thread Dies—lard oil should be used with 507 Thumbtack—removed easily by twisting head 623 Tide—highest possible is fifty-three feet . 427 Tongs—fireplace, for handling large logs - 487 Tool Hentiee—tacb eens of friction ae an aid on ebebheehededetewe 877 Tools canvas buffer puts edge on “ss 879 emergency veining ° ee knife containing ten tools .. 545 rubber heel saves .. 171 twelve in one, of value to the draftsman 997 Toothbrush electric, cleans teeth automatically...... 997 tongue cleaner on handle of ; oe 253 Torch—safe thaw-out nee : a 337 Tornado—automatic air vents protects building from , We ns ene és ay «oo Sar Tornadoes—on the sun - . ib am ree deca a Torpedo caught by camera as it leaves tube aah 896 controlled by radio a 262 Touring—motor hotel brings luxury to adven- turers “s 823 Towline Hook—that will not loosen 349 Toys sand motor runs dancing monkey 839 slingshot pistol combines two toys for boys.. 919 whistles for toy steam engines 326 Track—over stairway facilitates anes of “shop truck wired 527 YDEX, VOLUME LIII, 1930 15 Tractor cord attachment helps start. ... 174 garden, plows and mows lawn 601 motometer installed on ................. . 862 runs tramway spanning a mountain 541 Traffic danger on country roads greater than in city. 108 jars do little harm to buildings 640 reflector gives signal of car’s aggeeash “from side street sSuaveueties 535 Tramway—tractor runs .. KewceKew es 541 Trap—mirror makes effective rat trap. ; 683 Trap Shooting—hand trap throws targets for ‘shot- gun practice 769 Travel—in the land of the devil dancers 378 Tray—match, ash and glass holder attach to table 416 | tain dventures of treasure hunters .. 546 r fallen leaves worth money because of chemicals 39 fruit of cactus relished by Endions ote akees hw ae para rubber - 637 preventing yellow leaves 89 that glow at night to stop accidents 285 tree- fire mystery solved by plant detective 440 x-raying shows defects in wood 993 Truck—hand, old lawnmower makes good 322 Tunnel electric eye measures haze in Matiand 263 from Spain to Africa 366 launched like ship 995 new mountain highway has mile- long . 926 Turpentine—pure, will evaporate pene 322 Tweezers—wooden, easily made 321 Typewriter built into piano transposes music 802 has conquered many languages 807 Typing Machine—prints whole phrases at a time.. 464 U Certs epee ane keeps watch over 2 Uathediion - American paper used in C aioe for 32 fits in auto door 356 vending machine sells “ 460 without a frame folds like ‘envelope 617 with two covers to match dresses 987 V Vacuum Cleaner dirt bag for, more easily emptied 815 spreads perfume . roses 1025 Valve hand-driven grinder 533 shuts off water when faucet is removed 358 use of emery cloth in reseating 515 Vending Machine—umbretias of oiled paper sold 460 Venetian Blinds——how to repaint 684 Ventilator window, also serves as noise muffler 201 window, screen keeps out dust “4 279 Vibrator—on hand transmits energy through ngers A 2 Vienna—artificial ice-skating rink accommodates thousands sbect 812 Vise—bench, for rough work 320 Vitamines—two new discovered 109 Voice ability of singer is tested by wave recorder 587 the secrets of your voice 594 Volcano—steam from to heat Hawaii hotel 637 WwW Wagon—toy, is made into sled ... 440 Wall Paper—safety razor makes convenient tool or skinning seams ese 866 Walls—head radiated from 816 War—light armor for soldiers resists bullets 460 Wardrobe attached to closet door 673 hanging two tiers of garments | in the 498 Warfare—queer facts about mystery guns reve ealed 712 War canremente—teene | in pipe line located with geophones 802

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16 POPULAR MECHANICS INDEX, VOLUME LIII, 1930 War Maneuvers—airplane silhouette on cloth flown by real ship beta ~ * George—face is carved in mountain sas Washtub—revolving bench for .. Watch—garden-of-eden, two hundred years old Water desert air wells give... electric purifier for sea, weight of .. windmills on Texans range ‘save "drilling nu- merous wells for : Water Tank—five tanks supported on one tower... Water Tower—ladder made inaccessible to boys. . Waves—facts regarding giant Weather air is kept warm over arctic by ozone........ 7 asking questions of the clouds ae balloons send out reports by radio.... “fans” aid in daily observations... is our climate changing? rain falls inside airdrome = rain machine makes thunder and lightning. ae sense of animals due to air “wee world weather news by radio. Weeds blue vitriol destroys brine for killing effective weed hook ° killed by chemical to protect trees. —_ Welding peete—antematic stitches seams i steel plates , . Weldi: Rod—carrier Well—fire and water from one pipe. Whalee—kilied at the rate of thirty thousand a yea vi Whaling— ‘S Oo 8” saves whalers Wie cporaced by a switch Wicker Work—staining — Willow—bark is peeled by ‘machine. . Winch—load-binding, for the truck Wind—penetrates brick wall . Windmill class in building for Holland children over century old converted into museum..... used to raise water level on Texas range Window Sills—aluminum is best metal for lining of Windows automatic sash ends need for pulleys... clock pulls down before you get up.. preventing from freezing reducing friction of sliding = reversible casement window easily cleaned ie ventilator screen keeps out dust .. insulated, weighing to determine length. . used to cut marble slabs na nas student pilot in solo flight. how to soften plastic liquid, is fireproof and comes in colors. microscopic, structure provides dress ee paints stick best to wood grown _in spring. preservation, old, is revived in Germany quality of revealed by tests - Wood Cut—automobile prophesied in, four hun- dred years ago page veal Wood Pulp—surgical dressings of Wood Turning how to make spiral turnings... twist-turning with portable router Woodworkin cutting he cabriotve leg how to make spiral turnings.. simple inlays will improve your work. es Workbench—simplifies model airplane building Workshop heater for ° inner tube prevents | vise marks laboratory stand makes good tool for shaper makes good miller. . World’s Fair—the next Wrench for grease fittings includes five tools for tightening caylee lerepers novel tap canned xX X-Ray million volt x-ray machine of trees shows defects in wood snapshots are taken with powerful tube Y Yacht Race a five million dollar world’s most extraordinary Yeast—sunned, fed to chickens halemawed ‘a Yosemite National pesaersaeeen wagen for bad Zoo—light rays for reptiles... ‘ Zuyder Zee—pumps drain to increase farms. . Printed in U. S. A.

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