Popular Mechanics 1929: Vol 51 Index

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Popular Mechanics Magazine oO INDEX TO VOL. LI 1929 --O Edited by H. H. WINDSOR, Jr. Oo JANUARY to JUNE Inclusive Oo Popular Mechanics Company CHICAGO

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INDEX TO VOLUME LI

A Accidents—when the city’s “pie crust’ breaks Acids—swab for applying Acoustics fifteen million talk at once to equal horsepower. . photographing sound helps improve buildings ... Adventures—made to order Advertising om = that talk and carry electric signs feature on closed car radio sign-board that talks robots to pass circulars window display on wheels wrecked plane on a garage advertises service .... Aerial Ferry—mile-high gives travel thrills Agricultural Implements corn cutter and shocker grain cleaner on thresher harvester for small farm cuts reaping cost ...... harvester for sugar beets motor drives harrow blades for sharpening sheep-foot tamper rollers press soil firmly Agriculture berries ripen in forty days with electric lamps ... chemicals in grapefruit peel forms good fertilizer. . counter counts small seeds ... electricity as farms sun permits night work .... flyers make desert blossom forecast invasions of pests to protect crops fruit-jar seed-corn tester gas treatment for potatoes geranium kills beetle ice box freezes corn in field .. lava flow forms rich soil for growing grapes .... plants sneeze and take cold the latest magic for your garden vacuum cleaner for grain Air- Mail ‘ delivered on fly into net first envelopes prized by coll«ctors plane picks up mail on fly Airplanes aboard the sky diner airships to have trapeze for catching all streamline flies at great speed . automatic steering gear for better wings for model planes carries torpedo weighing one ton . catapults to launch planes on small fields cowling for motor increases speed England builds secret plane equipped with three-wire radio aerial fitted with headlights for night flying flying hotel to carry eighty four thousand engines doomed to be junked ree hollow propellers of steel to cut costs hot wire measures winds in tests improved radio for, adds to safety - invisible walls hung in sky to foil ............ lands in drag sail lighted, as bird lure .. metal coating on fabrics to aid. aviation model of rocket, controlled by radio motor silencer for d flying boat aids travel on Long Island slower speed demand of aviation .... pigeons carried in to aid flyers ... pigeons carried in to rescue flyers Dy plane picks up mail on fly between two poles. v0 04 plane rescues injured nua in Alaska .. plane rescues women from besieged city plane solves sea mystery in finding ship problem of noise baffies engineers rack for washing planes radio squeals may save, in fogs refueled in flight for endurance run refueling to aid flyers in second ocean hop safety stick saves student accidents Airplanes— continued seaweed padding in, decreases noise ........... see safer landings with new altimeter seventy-five million spent in America for ski feet for, land on ground or snow .......... tailspin warning given airmen by buzzer targets towed by, for anti-aircraft — test three-blade propeller for speed . that talk and carry electric signs the gold rush in cee oe aE ee to make malaria fight in Nicaragua ............ turbine propellers to develop high speed .. twenty passenger metal monoplane has wide cabin 3 2 twin-motored seaplane has high speed twin propellers add power and steady plane .... where latest designs are tested will she fly? er en to test omnes yr SEPP ee antic trip proves need for bigger “Zepps’’.... horn helps guide through fogs .. = lands on water to rescue balloonist observation balloon easily turned into to have trapeze for catching planes .. U. S. building two dirigibles, fourteen feet longer than “Graf Zeppelin” Alcohol-—from gas to aid industry Aluminum annealing small sheets of suits of, to resist tearing ; Amusements—“ joy rider” for autos is latest amuse- ment Andorra—to have a Monte Carlo Animals I I IE 6 ir a on kk s bye ad daa 6.2 . four little-known subjects of Uncle Sam SO WONG TIED ow ic cece cece wcescis Soca hae imported to America as early as ship mink in special crates ................... tons of dried grasshoppers fed to zoo .. ear <~ unknown to cats and dogs of ‘early wild ‘ite i is preserved in glass cages .... Animals, Sea produce moss to decorate hats Eee strange faces to be found only in deep ‘seas... Ants—a mixture for destroying ee a Anvil—resurfacing farm Aquarium deep-sea water imported for suggestions for your Archeology mmf burial pit reveals royal splendor evidence of Noah's flood mysterious tunnel in China may lead to treasure : 4 “Norse” ruins laid to Eskimos prayer wheel run by wind put on exhibit ...... ruins of fire reveal Indian secrets .. ruins of mysterious city found in Alabama secrets of Pompeii revealed in ancient writings. . the great Sahara treasure hunt Archery shots through four barrels show skill the trail of the arrow ‘ Army, British—repelling an attack on London in mimic war Army, German—training to fight on skis Army, U. S. fighters of the air .. new type winch for observation balloons Art expert believes old master worked from reflection needle tests oil paintings for frauds .... treasure ship guarded by destroyer escort Artists—in butterfly wings do work backward Asbestos—predict gowns of, for durable wear Ashes—sifting with less dust 884 970 99 . 543 . 546 71 532 544 . 764 913 . 888 . 141

464 £44 44GAGAGAGAEARRDOD RA DD ewe wm 51 OO ke ee , Autor

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At Vv ems" 2 a WV Qn Astronomy huge telescope to reveal many new stars ...... motion pictures of Jupiter show one of the moons 64 portable riveter for roads over railways safety gate stops, at rail crossings ............- saving all but the squeaks 5 op Bep MEE Sei A seek new k with str shade roller holds auto-seat cover . tester for front ends helps save tires .. a er aa the automobile of tomorrow ........ thin layer of lacquer guards, from sunburn toll bridge to link two states .... traction band for wheel helps car out of tuts. ae trick auto that turns sommersault te NOMI Sv cars ccacessatvessce “V"-motor block is cast in one piece ......... what price speed? .........-...-.-. windows reveal inner secrets of engine welt worn shackles cause backlash in Automobiles, Accessories air-brake system for .............0.. ca cuteR® anti-glare shield on hat for driver .. ash receiver and hand straps for .. ash receiver is emptied through chute. check spring on, increases riding comfort ..... chemical cooler for ..... clamps hold luggage on car .. i coal stove for engine prevents freezing ; foot scraper on running board force ventilator for, is draftless ...... gas-filled stoplight ............. se = bhi gauge in radiator cap shows water level gearshift control on steering wheel ........... heat meter for small cars only installed ... homemade gas vaporizer ; jack cranked at side simplifies ‘rasing car. lever that blows horn fits on “ented wheel .... light to illuminate motometer ............ safety-brake release .............. Puan tas safety bumper for pen safety throttle for, saves gas. salt on windshield wiper helps clear lass the shock absorber and jack combined sigmal om CRONE ......6.++-6 small safe carried in auto peas | license Papers : a spark plug with air intake spring clip for valve tappet starting lever for Fords steam-heat system for ........ suction-grip cigar lighter sweep wiper for windshield ..... trunk on running board saves extra luggage vacuum cup fastens watch to dash .... okt valve spring tester helps save gasoline windshield kept clear inside with electric heater. windshield wiper is heated ....... wiper heats auto windshield .. wrench for hub caps ........-- Automobiles, Cleaning auto runs washer pump ..... as a sponge-nozzle washer protects finish with steam from portable boiler ..........- tek skating on frozen alcohol possible on moon .... 401 the center of the universe ..............---++: 78 ton would go in a match oy - * non star .... 531 Athletics—are you another Babe R ope teeta Se 416 Atomizer—fits in vanity bag ............06.5--500008 367 Automobile Bus scrapers on, eliminates ruts ibeenea chen ae nn Ue. 5. 7 5 too bbe as bon a0 nes kes 5096 104 Automobiles advertising feature on closed ...........+.-.-+- 315 automatic coupling stops gear-shift troubles .... 988 auxiliary gasoline tank prevents stalling .. ooo Oe drivers test speedometers on mile-long stretch .. 754 electric “eye” to count autos using river tunnel .. 730 fording flood with an auto ...........-....+55 138 grooved bridge for, saves building floor ........ 449 “joy rider” for, is latest amusement ........... 609 mile cost of running, six and a half cents ...... 984 new rocket car develops high speed in test ..... 33 odd mirage hampers speed-record trials ........ 992 odd two-level bridge for ...........-.05000e0e: 907 nn Pee 510 OO GF GE ITD ow cen ccc scccescceccns 515 POPULAR MECHANICS INDEX, VOLUME LI, 1929 Automobiles D. Design _ automatic gear shift eliminates lever more speed Automobiles D anti- glare shield on hat for driver . autoists required to speed across viaduct ....... ic brake pr t distant switch starts auto drivers’ tests save lives ................. glare screen on windshield peatadesss's frit’ map tells weather to aid ... ht for hand signal lights . £. 3. “epee S ree moving map for driver ........... signal arm for closed car .... sings while driving to relieve ears . safety Automobiles Engines—two-speed has valve control... Automobiles Equipment and Supplies " chair and baby crib in one .. rumble seat top with side curtains Automobiles Fuel fish source of, experiments forecast method for filling gasoline tank synthetic benzine process to aid Germany Automobiles Lighting—installing a backing light ... Automobiles, Lubrication automatic oiler reaches all parts of car ....... oiling lock wheel on Ford parts of car that are seldom lubricated .... Automobiles Maintenance—care of automobile doors. Automobiles Pain ting easy method of sandpapering . fluid mask keeps lacquer from windows a ~ a Parking—plan auto park to relieve Paris traffic Automobiles, Radiators conserving motor heat in zero weather novel sprinkling can used to fill thawing out frozen Automobiles, Repairin alining auto “eo - ~ i auto lifter fitted on wheel . circuit breaker for testing wiring dashboard holder for tools ... - 679 . 560 847 686 667 695 368 279 fishing rod aids in removing broken parts ‘of axle . how to silence Ford valves jack for spring repairs .. mucilage stops leak in gas ‘connection patching and prolonging auto tops preventing wear on touring-car tops remedy for engine leakage and clutch troubles . repair for leaky gas tank iektite repair spacer for door-catch bolt ...... replacing auto rear-end . safety-first while working on car : * spark plug contact makes changes easy spring clip for valve parts .... tool for lining brakes ..... tool for removing bearings from axle. spindles Automobiles, Tires air from spare inflates flat changed in seconds with new tool sk Pike aaaitel clicks tell motorist when need air combined hammer and wrench simplifies changing 208 6 cover for tire padlock ne lock chain covered by bicycle tube old leather belts protect, in garage press for inner-tube tests ; shock absorbers add life to .... shoulder pads made from old tester for front ends helps save what to do when inner tube gets porous Automobiles, Touring—roller maps for autoists Automobiles, Toure —weeinese on sunning bensd BOTVES «cee cece eeee Automobiles, Trailer automatic brakes on simple attachment for Automobiles, Truck as movie theater serves small towns . extra wheels on Ford “AA” doubles its + capacity. for trimming trees .......... self-emptying, speeds street cleaning three-wheeled, reduce congestion . workbench on front of Automobiles, Wheel—removing without a puller ..

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POPULAR MECHANICS INDEX, VOLUME LI, 1929 Aviation airplanes of slower speed demand of ........... 376 eieport. Mice coummiry Gib .. 2.6... seis cases 622 airport with lookout tower ................... 57 army experiments in parachute jumping ........ 82 automatic sea radio beacon .................... 456 aviator rescued from tree ..................... 905 “beehive” airport and hotel to hold many planes. a | OE aera rer big light for landing fields shields pilots’ eyes. 190 canopy protects passengers on air liners ........ 5 correction in article on ‘Women of the Air” in BRE BPS a2 e a 640 face mask permits free breathing .............. 798 fans of light guide flyers in making landings ... 945 oe Oe eee ee ee 546 flags direct air traveler to foreign aoe 709 flight of the “Question Mark” ................ 353 floating airport to serve line to Bermuda ba a.e Since 938 flyers make desert blossom ................... 926 Ie Sore i ak 6s oct a v.6ms Ge paieaa 194 flying field, lay dust on with salt .............. 400 flying hotel to carry eighty .................. 907 flying news from all the world ................ 886 fourteen thousand hours in the air 610 gas tank as airplane guide ........... 471 gas tank directs aviators to landing field 757 gophers on landing field menace to .......... 939 heat bombs for air raids ............. 785 TS GUE Oe wid b% 0 ed oo d0 0 0 0 owls s we 793 high school course in, to aid flying ............ 13 hollow propellers of steel to cut plane ‘costs .... 4 horn helps guide airship through fogs .......... 240 hunting gold mines from the air .. 58 landing lighs set in ground show winds’ direction 461 longer burning flares aid pilots in landing ...... 904 mapping Canadian wilds from the air énckn ae mirage seven miles in air described by flyers .... 766 more women than men fly on Englsh air line .... 182 most accidents in flying laid to aan ~N, a 720 navy airplane carriers : ale 632 parachute has metal ribs to aid in landing err 541 pilots are given warning of ice on wings ...... 184 plane refueled in flight for endurance run ..... 401 plane rescues light keepers marooned by ice .... 711 planes to carry diamonds from South Africa to EE eo ce ee ee ee ee 398 print town names on roofs to guide aviators .. 105 . radio talk with Byrd plane sets wireless record.. 552 refueling to aid flyers in second ocean hop ...... 989 safer, cuts insurace cost ..... vod Can seaplanes speed up mining in Canadian fields ae Fe see safer plane landings with new altimeter .. 248 seventy-five million spent in America for planes .. 958 silent and invisible planes next step in ......... 47 smoke barrage from planes to fight forest fires .. 392 static harnessed to aid in weather forecasts students taught blind flying in a barrel ........ 937 tall building to have aerial beacon ............ 466 targets towed by airplanes for anti-aircraft . + a RR Sere eee te .. 378 the new flying SSS Ree ep 529 IIR. 5. 5 + da W684 Nidivse tone aes aetones 1 tuning fork to guide planes | in ‘fog ‘ 2 ee war tank is run by radio from moving plane. ai>- ae water tower to guide flyers by revolving lights .. 960 NE ee IGE i oko ose Vi peeee HET OT) omneee 42 B Bakelite—use of, in photography ee 866 Ball—steel, gauging size of without tool .... 1049 Balloons captive, replaces tower as aerial ............... 48 observation, easily turned into dirigible ......... 225 observation, new type winch for .............. 71 pole aids jumper in taking off 249 Ballroom—the magic ................. 323 Banks coin sorter and counter saves time .. eave 823 deposit money from autos in chute outside . . 232 Barn—entirely of masonry, resists fire chee ice a Batteries clamp for terminal requires rio solder .......... 992 coating terminals ........... 165 storage, foot clamp aids in repairing. bivclat Coenen 398 Beacon—portable electric flasher replaces signal lan- tern electric heater for........... warming the, on sleepin rch Bedbugs bg ob ae eliminating Bees earn income by pollenizing fruit blossoms ....... fifteen miles an hour average speed of flight . have poor eyesight tests show measure of breath shows insects health portable tool-box for keeper remain active to keep warm in winter Belt—a good dressing for Bicycles coin-in-slot lock for, foils thieves radio set built on ey snap spring luggage carrier ........ Billiards chilly air spoils game ......... combination dining and billiard table tricks at the table Bird House—novel Birds carrier pigeons fly only in daytime py Cuban hunting bird is world’s smallest ... eagle’s feet on coin right? nope lighted plane as lure for haw mystery, land on ship at sea ............ oil from ships kill by weighting wings pigeon nineteen years old ..... pigeons carried in airplanes aid flyers - pigeons carried in airplane to rescue flyers record distant flight made by arctic tern .. sleeping on branches exert automatic hold .. small, put out lights by short circuit tower built to study eagles Blacksmith Shop—on wheels saves farmer’s time Blanket—army, resists water ..... Blasting—short-circuiting leading wires of apparatus Blood—made with chemicals to help g gas victims .. Board—wood pulp tile .. Boats and Boating bell anchor for a small . concrete anchors quickly ‘made 877 160 . 400 . 73% 1. 4939 . 447 1040 15 49 engine in extreme stern of new a speed boat 593 fastest boats ever built hand hoist for power how to handle hot outboard motor inland harbor for yachts . : lifeboat that won’t sink ; lower lifeboats on track to promote safety motorboat run by air propeller navigates shallows ‘3 oar used as rudder for rowboat a outboard motorboat for shallow waters .. outboard motorboat racers to have own track outboard motorboats from sputter- assy! to water speedster . i “outboard motor” ‘pleases youngsters. “pepping up” old outboard motors preventing loss of outboard motor serviceable canoe jig for boat house speed boat in somersaults #5 speedboat motor lies flat to lower gravity ‘center steel, for Arctic travel . ; steel outboard motorboat built like seaplane supercharger for outboard motor tests with model rudders aid safety tiny fireboat run by outboard motors wa yacht fitted with gun for shooting big fish Bolts starting in hard places Py that locks itself resists vibration Bombs—heat, for air raids Bookcase—making a modern , Book Rest—fitted on chair leaves hands free... Books at three cents each . hs apes how to make an envelope wax coat on bindings prolongs life . 937 257 '1024 288 Boots and Shoes—wheel that welds, speeds production 199 Bottles ‘ drifts many miles on ocean currents handy tipper for distilled water . holder for baby Bottle le P P Boxes Boxin Brake Brass Brick b e Bridg n P Si sl si s] Buildi k Se st st w Buildi & Qn oO te Bulbs Bullfr

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224 1041 . 569 . 501 . 877 0, 696

POPULAR

Bottles—continued A 3 es reer eee erie Pee Te 1035 TD = eee ee .1054 MOND cio ae Ui see We t's cot eet icucwte 313 Boxes—Ballotini inlays for ... a ehadly ewer eee 311 Boxing—punching bag worn on Ee Re 630 Brake Lining—surfacing new ........ isles evel 1049 Cs [GN 2b bose k'c ce Pee ce coves veeee 171 Bricks : blade removes mortar and pries apart .......... 800 GN. 2. 820. UES is crew veces ce _o» See see hundred-story building as result of new .... 736 Bridges arch, in Australia to have record span . 759 automobile toll, to link Oregon and Washington. 621 built in sections of precast concrete ........... 268 contrast in size of, shows steels advance ....... 80 float span into place EE ee Tae ° 376 Grand Canyon auto, an eaten vietory: _— | grooved track for autos .... ‘. +i magnet test on wire reveal defects ae . 283 “moon power” is harnessed in building across San Francisco bay ..... s 544 odd two-level auto, spans ‘Los Angeles. river. s+... 97 painters risk life on St. Lawrence river ........ 817 seven-mile, spanning San Francisco bay ....... 720 le IE ON MIR Sc disad.can cy evs ais ot ones 968 strength tests on, to avoid. accidents PP sere ere 540 wires squeezed into cables to support .......... 393 Brilliantine—how to make ..... a ee 842 Brushes, Paint—and how to use SO ee Building Construction a on beauty to burned earth of ancients .... 232 add stilts to old building for extra stories ...... 634 floating floors help reduce noise ........... ; 710 DE ED WN IE 55S cbs oes cc's deeb bees 349 method of alining caps and base blocks in setting ED SEE nds Kh eV bch cat doe csbscS ae es 864 new homes from old ... bay phetographing sound helps improve building sees ae saving time in Sone aw short cuts and kinks in ........ 46> ov ab sifter for building sand improves plaster er spacer for frame building ....... Building Material kill germs that eat stone ..... 561 seagrass serves as insulator against sound and heat 561 soundproof room devised with new materials .... 223 straw as, gives good insulation .............. 17 EY WED. UND WD 5 oc ces vccuscccccences 49 Buildings glass house keeps out dust and disease germs ... 960 modern art for apartments ................... 951 of non- — steel has novel lighting dieses on) tall like obelisk to guide aviators .............. 466 Bulbs—grown indoors by floating in dish swe kes 181 Cc Cables joining ocean, calls for special hands ae new, sends eight messages at one time 460 under P Pacific ocean lie six miles beneath the sur- ac ; ie senuneniial by radio to speed service so ee Cafe—stove and blankets in, draw winter vemeced ... 465 Calipers—emergency nee ..... 5. ke ..+-1042 Camera aids talking pictures . as automatic focusing possible for home movie .... 640 eyeshade for reflecting ......-..--+..---++: ..1018 movie, records tide action under sea - .. 104 phonograph crank for winding spring of movie.. 332 travel of flame from explosive snapped by ...... 752 Camping an outdoor stove ... bs ptad bes oe combination shelter and sleeping bag éwW bile Hai 68 MECHANICS INDEX, VOLUME LI, 1929 Camping—continued iceless refrigerator for campers ............... 1034 novel washbasin for camp ................. . .1022 pocket first-aid kit : trveas ee ae rainproof inclosure made from. saplings ; 1021 spare auto tire supplies compressed air for omer oo substitute for water bag Cams—jig for layout of ........... Canal—Nicaragua, to save time in shipping se Cannons—fire old, to save oil in burning tanks ..... 41 Canoe—serviceable jig for boat house ES Canopy—protects passengers on air liners adjustable scraper .......... oo hae simple device for scraping from exhaust pipes . 333 Cards—playing, holder fits on fingers ... .. 576 Carilion—memorial has sixty-one bells .............. 78 Carrier—convenient nut and washer .......... ‘qe: Se — as Sr too much sleep in daytime not good for ........ 24 Chimes—electric, ring thrice a second .............. 295 ney felled from inside to protect buildings .......... 425 smokeless top .. b ietdiniattes ets 168 China—ideas from, aid Western World ... 256 Chinatown—the truth about the Tongs ........... 914 Chisel—sharpening wood. ............6....cccecees 500 Church is raised on stilts for filling gulch ........... 534 pulpit like vessel’s bow ................. 999 Cigarette case and lighter ........ ee bea die Sage Ge eens Se lighter im pencil’s end ..... 2.2 ccc cueess ose) Fae Cigarettes—coated to reduce fire hazard ............ 976 Circle—centerless marker y . 348 Circus—latest stunts thought up wll isa csc tees 285 Cistern—safety cover for .................005. 1036 Clamp made of wire cable is so Reb aied dan be ...1050 err et eee eee 446 Clamps, Machine—swivel ends” improve — Clams—grow by new method to aid button industry 903 Cleaning automatic sprayer for cleaning (bse ssacnces- ae dry, mixture iva ss «shh ¥405.s aan Oiee ee lard removes tar spots ag seks 343 Clock for telephone saves extra tolls > wivdinae ae that won’t run one of Edison’s successes os 960 turtle tells time on magnetic .. 109 Closets—wallboard used for making . ee : 331 Clothesline—simple tightener for ................ 856 Clothes Press—improvised ; i ye Clothing aluminum suits to resist tearing joea de> 209 automatic sprayer for cleaning ............ 103 paper, is washable : 816 predict gowns of asbestos for ‘longer CN. Ub avis 888 Coal ’ delivered in boxes to reduce dust eh 12 filters salvage coal dust floating on river ...... 590 food and fuel from Ldaith cadighesheasds oan 225 pipe stems made from ..

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6 POPULAR MECHANICS INDEX, VOLUME LI, 1929

Coal—continued Diamonds—continued Elec; pulverized to run ships ....................... 708 d { ter—for snow or ground ........... 1.0... 432 iues ts Deksoten pardiee sae oe: it | Coffee—more than half grown in Brazil is imported planes to carry from South Africa to London .... 398 Elec OU Pere ore ipaeten aca 799 purest form of crystallized carbon .............. 120 ; ee Urn—and steam table single burner for ...... 874 Dice—easy trick h. : . i an . ded tes és altel virran bis iand's ain 113 Coll—rapid spring winder ................cccccece 907 Dictaphone—radio record on speeds news reports .... 591 ome oy doll ight? Dies—grinder run at high speed sharpens .......... 912 Elect g m silver dollar right? .............. 545 Dirt Hopper—fitted with wheels .................. 877 Elev: sorter and counter saves time ................. 823 Disease Ellip Color aircraft to make malaria fight in Nicaragua .. 784 Eme = Senne oe Me ge - — Pe tee = } ne mg foods poison you? .......... “ ‘cartin' aed A Engl wic effect of, keeps steel cool ............... ES Cini ys sk we 5.40 0 dee eed ws dae 778 Enve Compass gas mask for asthma REESE CORI 465 Enve magnet, finds gas mains ....................:. 937 insects as I 55 po ora 5 wie nd cen need 600 Eque c sliding-beam promotes accuracy .............. : a > liquor stills in hospital help cure ............. 939 z r oncrete ogs rase air-driven tool smooths for _taleting Soe a 109 “police- dog trained to pick coin from many others. 182 Erosi — go hy ENE Sg i ae lemmas C5 268 D iv, UN SND 5s Spre' tae acid Fe + eg i aighte ce connie — * Pp Crane ynamic er—a stand for the ................ erry on top of high tower eliminates scaffolds .. ..... 945 Files— on tractor feet speeds swamp work ............ 984 Filling Crime Pp * anti-burglar window catch .................... 412 E w bank-guards bullet shield, helps foil bandits .... 73 Finge bullet-proof vest has gun fired in raising hands.. 226 Firebe how invisible light serves to prevent ........... 399 Eardrums—homemade ..........-.--+--+eseeeeeees 846 ti pistol, shoots tear gas foils bandits ............ 89 Ears ? Fire 1] revolver rack on auto dash aids police squad .... 552 hearing through your fingers .................. 755 b: steel armor in folding kit protects policeman .... 785 scrubbing too hard may cause injury .......... 534 fr “telegraph-pole” plan jail, to reduce ...:........ 905 Earth Pi the invisible man hunter ..................00.. 712 exploring the, under the sea .................. 251 se thief snared by powder sprinkled on purses ...... 577 interior now known to science ................ 377 sk ee Serer ere . 770 is rotating faster, science declares ............. 109 ta Crystals—how fo dissolve quickly yo Koeln sade es 140 Earthquake 9 Culverts . : : : Indian scared by, returns stolen treasure ....... 365 Fire 1 steel, as piers aid bridge builders .............. 968 uake warning saves lives 185 Fire | with flat bottom ........ 60-0 0eeseeeeeeeeee es 967 » * ypencrhnaeslne ft SEA ROERERCRR Curtains slightest tremors shown on new recorder ... 646 = improvised < —— 9 hoe Sega sah lalag aia aria -+» 330 Education—stuttering child as bright as normal pupil. 616 be tracing cloth for, admits rays ........ r++» 569 Eggs—cardboard jacket for, prevents breakage ...... 98 : Cutting Machine—portable, makes many designs -ee 289 Electrical Appliances Fi A ires, automatic toaster opens up like a book ........ 432 sn neon — — —— on eens Ree on goed ap w take-up for cord prolongs its life .............. First-/ D Electric Fan—excessive oil on 141 Fish Electric Fixture—light cond _ any ‘angle by jointed — at ms —— : , Electric Iron—safety stand for ..................4. pune, sees guest reclamation project.. 14 Electric Lamps—berries ripen in forty days with .... 800 ar online ea eat Electric Light . H Edison to remake first light cand aa te ek wae 940 Siete ast to Mads Gas .........------60-- +4. eee powder inside removes black deposit | ebenaeee 961 ch hearing through your fingers .........+......4. 755 small bird I rt cog ee, 608 on a ED Soros colt hobw ssc venieh con 846 ‘thresher” salvages Bie, in us an i. cccs este 925 de ; ele aluminum mixed with gold aids ................ 590 Electric Outlet—on floor simplifies wiring .......... ; iodine injector for teeth eliminates pulling ..... 365 Electric Plant—portable for light and power ........ 568 = more than 2,000 women practicing in U. S. . 81 Electric Power _ i ; gr Department Store—two million pennies a week used by 599 Edison explains cost factors in producing ..... 448 ry windmill with six sails to generate ............. 730 i the great Sahara treasure hunt ................ 554 Electric Radiator—latest home comfort ............ 190 re tractor armed with cutter helps reclaim ........ 295 Electric Set—for kitchen is six tools in one .......... 929 mee Desk—mouse-proof drawer .........-...6 eee eeeees 1018 Electric Switch—with pilot light ................... 471 ~ Diamonds Electric Warmer—for food requires no water ....... 905 ch find in Indiana traced to Canada .............. 230 Electric Wire—oiled cover on, simplifies installation .. 728 a

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POPULAR MECHANICS INDEX, VOLUME LI, 1929 7 Electric | outlet on floor simplifies ...................... 359 i whe owns ons nugun catwooniaets 754 Electricity circuit breaker stops flash .................... 813 in small towns shows industry’s growth ........ 809 muscular movements produce ................. 458 Electrification—electrifying the holy land ....,..... 26 Elevators— el grain, loads cars and boats ........ 629 a el err 866 Emerald—tichest mines are in the Ural mountains... 950 English Channel—new plan for tunnel ............ 767 Envelope—how to make a book with an ............ 1024 Envelope Sealer—hand, has no wicks or sprays .... 240 Equestrian—teflector on saddle stirrup guards night , batrende ee eine wilitanss ab ects be oo vs eSs 6s 03 252 Eraser, Ink—made of glass shaped like pencil ...... 989 Erosion—soil, stopping is urgent need ............. 749 Excavation—watcher on hunt for relics ............ 210 Exerciser—electric, is portable ..................45: 13 Expeditions—radio in the arctic ................. 1000 Exploration exploring Davy Jones Locker ................- 394 secrets of the Polar sea ........-..-ceceesersos 794 Explosive—travel of flame from, snapped by camera .. 752 Eyes : P me: ; magnifying mirror aids in removing dirt from .. 94 tears contain a chemical that kills germs ...... 993 F Fabric—new, metal and paper combined in ........ 65 Face—beauty is traced to long use of the jaws ...... 368 Fans—hidden in chandelier improves ventilation 721 Farming—time and labor saving kinks for the farmer. 700 Fence ; auto jacks for removing posts ...........--+-- 857 circular passage in .......--- 000s eee s eer eeeee 518 preserving posts .........-.-.--eseeeeeeeeeees 1048 Ferry—mile-long trains go by, to Cuba ............ 366 Files—hand holder for ...........-00-eeeeeseeeeees 847 Filling Station = gauge for gasoline aids .....-.-..---+++++> 912 water kept from gasoline by safety walve ....... 634 Finger Pad—rubber, for holding hot objects ........ 140 Fireboat tiny, run by outboard motors ........----++---- 105 ire Fightin) ran" ron for rescue squad ......+.-..+-0000005 961 freezing gas curbs fires ..........--0--ee0eeees 590 private fire truck serves owner and town ...... 66 searchlights on fire wagon aid firemen .......... 31 skyscraper fire tests fighter’s skill ........... 602 target practice with water ..........--+--+ss0s 72 with a tunnel, latest in oil well blaze ........... 119 Fire Hose—holder for nozzle .. ree Se Fire Prevention—Underwriters’ laboratory tests 434 Fires ants fight to save their nests .................. 719 coated matches and cigarettes to reduce hazard .. 976 electric “‘eye’’ sees smoke and puts out 79 oil-well, put out with snuffer 198 Fires, Forest . smoke barrage from, planes to fight ............ 392 wind “sock” on tree aids fighters 120 i CO, cote sacle tcbdcce sconces sceve 682 Fish and Fishing ; about ten-thousand is the annual catch in antarc- I. salah cs dena. eon fas) s2s oak ee 541 ancestors of whale lived on dry land ........... 728 baby whales average about two years to grow t 2 SAA eee o baat os a chemical process keeps fresh for one month ..... 718 I a ero eee 503 deep-sea water imported for aquarium ........... 209 electric shocks keep fish from irrigation canal .. 432 Eskimos make ice cream from oil of ........... 281 fish are found by echo-sounding instruments .... 890 grow larger under lights in hatchery pools ...... 250 “Hooligan” fish supplies both food and light .... 617 keeping casting-rod guides in line ............. 1018 lookout on tower fishes with telephone ......... 377 modern methods of whaling ................... 601 natural lighting aids sardine fishers ............ 269 cld bottle caps help catch fish ................ 856 old canvas water bag to carry ................ 508 Fish and Fishing—continued sharks to yield profits in oil and leather ........ 359 source of motor fuel experiments forecast ...... 78 storm “shipwrecks” whales on African coast .... 809 6d ee ree Yor Fay 680 worms given special diet make better bait ...... 801 yacht fitted with gun for shooting big fish ...... 397 » UL rs coneraie, is war memorial .... 209 irect air travellers to forei WUD cscccccs SOM Flashlight—has own dynamo .... ~ t “oe ye pes 184 Floodlight—for landing fields shields pilots eyes . 190 a ee id b ayy aol draws crowd ............. 708 r Wi Re Oe Es Sotaccevceccs 4 aah 338 floating, in buildings help reduce noise ........ 710 handy chip and dirt blower for repairman .. 872 steel armor for concrete ...................... 793 Flowerpot—self-watering ......................... 400 Flower Stand—made from barrel hoops ......... 667 gk ke eee 432 keep longer without chemicals 448 ee I WE ke cas cc cccddhcvescctals 1024 a a, EEL EE Te Ta ee 225 color is found to affect demand for ............. 280 SP WD PU Es os ES ences dace eck 227 I MOE WIS Socrates sha v'cdGele ec tone’ 905 Footbali—glasses in helmet aid player ...........__ 24 Footrest—paper covered for shoe stores .......... 637 Forests—summer homes for all in national ...__ 718 Fruit ee WINE aso pha eld cis Ses ccxthe 993 dump-bottom bucket saves pickers’ time ...... 253 preventing quick decay of .................... 849 Fuel Oe Se ia NE iodo seo wi ee 225 filters salvage coal dust on river .............. 590 heavier, to aid aviation ...................... " 793 mix coal dust and cement for................__ 268 pulverized coal to run ships rivals oil as parr synthetic benzine process to aid Germany ...... 791 sag Oil—replacing gasoline in busses .........._ 602 ur raising Karakul sheep new industry edu sce Gee ship mink in special crates to aid industry ...... 457 Furnace - automatic humidifier for ........... 190 cleaning smoke pipe in .............._- 147 down-draft stops smoke ...................° °° 95 filter for hot-air register ...............°°° °°" 359 pity gna ee ern ate fae bench for Spanish radio cabinet ......... 654 holding tacks in webbing ....... es ee 339 how to refinish your old .......... ...150, 504, 668 making a modern bookcase ........... 520, 697 tape used for decorating pans Ws des Seda 847 Fuse Box—that throws switch automatically ....... 321 G Gambling—old republic to have a Monte Carlo ...... 23 ames basketball played on table

BO secceces 600 buzzer to answer questions 461 coin-in-slot horse race Renal . eee ae favorite steamer-deck game now played on land .. 716 golf played on pond Bieber enaes seueep es 976 nine-hole indoor golf set -_ 575 rug serves as board for golf ................. 464 Garage auto stored underground to save cost .. 103 raising with auto jack ....... ave 509 twenty-four story, holds thousand cars . 810 wrecked plane on a, advertises service 888 Carmpe. Equip and Suppli ndy lighting fixture for hale pie we Awenidaca aan Te thawing out frozen radiator é-0:n <0mere 60 6 ae tow bar steers towed car ............. 874 Garbage Can—hoist for iain sk Werle ho @ lieben 149 Garden Hose—tape repair fér ..................... 1018 Gardening EE oS cba oc Woks 2 c's b'80s be we eeee es 936 OE 985 the latest magic for your garden ............... 868

Page 8

8 POPULAR MECHANICS INDEX, VOLUME LI, 1929 + que icneeed NN En od. cutee sue cada 1019 alcohol from, to aid industry ........... eet, blood made with chemicals to help victims “a Sas SRR area ee 590 lighting, seek harmless to prevent deaths ...... 103 i 5 oor a0 ba a plas 0.0.0 0. ais VOR 269 routs army of rats to protect city” EPS FP AE 456 war, projector has long range ................. 64 Gas Mains—magnetic compass finds ................ 937 Gas Mask I ws ne wane 465 for housewives aids onion peelers .............. 3 Gasoline neutralized, stops danger of deadly fumes ...... 266 I I I oan ona hws sae vin snnoeee 348 Gas Tank ap airplane guide .... 02... 22-0. scscecesscceee 471 directs aviators to landing field nie ocx hee 757 Gas, War—water shield for houses to NRE 231 Gate re re eee 147 I I og. ees v co seeeseens 682 Gauge—depth-indicating thread ................... 1050 Geese—weed berry patch ....................0000e. 559 Geology—tiny life cells made to grow again ........ 108 Germs—tears contain a chemical that kills .......... 993 Glass SE a ae eee eee 1026 Ns RN ARON. |, seo sind 0's bun s'> Hane ds ee-o hh 198 house built of, to keep out dust and disease germs 960 rubber ball for ED os 05 0's KRSM Ws «BRS pele 171 SE, OR Eg oé's i006 '2.b60d 0 Gm 00's eae 605 RE BRP III a in cose vide vb ties cv veweces 799 Glue—electric drill used for mixing ................ 840 Goats—hunting with camera requires disguise Sach coous 448 Goggles—for prize bull .............-- eee eee eeeee 81 Gold—carried by Gulf Stream ................00555 985 Gold Mining hunting Es atihars slip ad a)eesiehd Kawe we 58 miners harness surf to get gold from sea floor ... 542 the gold rush in Cannibal Land ............... 732 Golf NS EE ee ee oe eee eee 976 “gun” holds balls on outside of bag .......... 728 handy place EINE «53.5 cue oe 0seace opi 501 .in your own backyard ts earttitne6 .1015 nine-hole indoor game improves putting ———, 575 periscope for ....... 2.6.2 e- seen ee eeeeeeeeees 425 tee is set at angle for longer drives ............ 768 tee tip for golfers ........-- 4+. - +. 1 eee eens 857 wire net on club head helps recover ea 799 Grain 4 box for fanning-mill screens and bags .......... 692 Si DS. ys 5 dive te UU bed held cid ad déléea' 953 ee NR eee eee ee 873 model elevator loads cars ) and Bae oC. ccd sce. SP vacuum cleaner for ecko yee REN inh aha cote we 417 Grease Cup—holding covers in plese Sy PUR ae eae 1023 Greenhouse—tinted glass for .. mink Gtemenil 799 Greenland—area four times that of France .......... 897 Grinder ‘ run at high speed sharpens dies ................ 912 washing machine motor rums ................. 139 Grindin a sehere Pctitrda seamageh ak Ce oe aha to 48%.b% ee 526 i ht ee ds co Man 6 ie cs heb 0. ¢s\ ce ie ane 341 Ground—how to ‘level rough ee ue eng Se desek 667 Ground Clamp—for electric welding ............... 1041 Guns on yacht for shooting big fish ................. 397 drives pin through metal ivieevd jovees ee handy pistol-shell remover ... TE pistol shoots tear gas cx ae shotgun fired under ocean to measure its depth 440 small corks used for cleaning rifle barrel ....... 325 Guns, Range—fires steel balls in target practice ..... 273 Gymnasium—how to build your home ....... ~~ H Hair—index to left-handedness found in ............ 975 Hammer i Mi... Mu thediats iw denen <edenawes 873 EN <n dc aot cok Pa EW < 0\0.00 50 dds e642 974 Handkerchief—easy tricks with .................... Handsaws—gauge for side-dressing ................ Hand Truck—attachment for the ................... EN LON Ee adn ds 53s hate biwch ods cckeeia Heat how affects trees ............ magnet holds six hundred pounds from a flame .. Heater, Electric in the form of a slender bar warms bed and serves as drier ................. Heating and Ventilating—where hcuse heat goes ae Helium leaks through glass, test shows plant, “‘coldest spot” hats anh eer ee Helmet—football, glasses in, aid player I MN ik occ ile b's « bieid pres wlenicce Holy Land—electrifying the Homes average one-family house costs five thousand .... harmless luminous paint to light ............... models of, aid builder and buyer .. new, Nt 0... oki atein os. roof-bungalows on skyscrapers , summer, in national forests for all Homestead—land still available .. <p Horse Race—coin-in-slot game tests players skill .... Horses adjustable wooden .............. racing, light rays for lois ntaliant ove oy reflector on saddle stirrup guards night riders .... Hosiery—longer life for .. Hospital—liquor stills in help cure disease Hotels “beehive” airport and hotel = FR fe A in form of boat features lake resort ..... wonders of modern, shown at exposition House CE EEE TOE water shield for, to foil gas OE SRE Household Devices. P .110, 286, 462, 638, 814, automatic air- cooler cabinet for home baby’s milk-bottle cap .. aes bag with outer side pocket for loose change as ere bottle opener, wrench-like in shape ard . brush fits broom handle for reaching into ‘corners. cabinet for drying clothes also warms plates GY i, SOI sans Se achunebénccereccs clothes washer, electric, attached ‘to sink crib, collapsible baby ........... dish mop has space for soap in base doughnut cooker like waffle iron ....... drying rack folds up ir. small space ............. dust and moisture-proof envelopes for garments. ‘ duster of silk fits on hand or long wire handle ... electric range and boiler combined eg electric set combines several useful kitchen ‘aids “i electric set for kitchen is six tools in one fizz top for beverage bottles : ba flatiron, safety stand for SE TN GID icine sain ce Kcctepnsieinnscin es fruit-juice extractor attaches to table bao a alieal frying fork specially shaped garbage bucket, paper bag for .. gas mask for onion peelers .. glass-door cabinet for range stops smoke and odors hair drier connects to vacuum cleaner . j heater, portable gasoline high chair with latest improvements holder for hot pie-tins . Selvatte hot-pan lifter also opens jars and pee ice pick with spring handle iron, electric, has ventilated handle ironer, rotary, saves time and labor ironing board, small, has rubber feet ironing cord, holder for .. iron with gasoline heater attached ............. laundry bag, steel holder for .................. mop wrung by crank ee ma aia a, AR percolator, wood and metal handle for .... pie and cake tins with handles . pin container holds three-hundred — hee serving dishes, holder for ....... : siphon for washing machine .................. soap dish, rubber inset for holder .......... splash preventer for high heels . spray hose for sink drain .......

Hou: Hou Hou Hun Hur Hyd Ice Ice Ice Ice Ice Ince Indi Indi Ink Inn Inse Inst Insi Inve Iron Iror Irri; Irri Isla Jacl Jail Join Jois Kit Kit Knz

Page 9

rs

POPULAR

Household Devices—continued steak broiler on top of gas burner .............. 110 steel wool, hooked handle for ................ 110 stool and ladder combined ................---- 81 stove, electric for use on table ................. 815 stove fashioned like cabinet ................... 287 strainer, double with two sieves ............... 638 DS See 638 toaster, automatic opens up like book .......... 432 vegetable parchment for cooking foods ........ 463 vegetable peeler has curved blade .............. 111 vegetable peeler on knife ..................055. 98 Se IE IIS fw cn cc ccc cc cccvcsse 638 ee EEE GUEIED occ acces cececechcctsee 287 washer, small electric ye PS 639 washing machine SH iby gasoline engine . 462 ES EN ER SE 75, 351, 527, 703, 879, 1055 House Wrecking—war tanks ai ®, old prison 199 Humidifier air-conditioner for home keeps out dust ......... 885 for air furnace helps guard health .............. 190 portable for home runs from light ee ees 393 Hunting—knapsack for hunters ................... 753 Hurricanes—why .............00s00ee 90 apg ged Power—from the water wheel to super PEE ob ads a 0k0 CasetN van chats 4 eecdnes 95 I ce a ee 822 cubes fo:med in tray of special metal ........... 233 made from chemical for skating rink .......... 357 Ice Box EE NE Sia now wate Weis 0.4.0.08 or enenwe 510 space for milk bottle ............. 3 «akan 341 Ice Cream—Eskimo, is made from oil of a a 281 Ice Cutter—homemade engine-driven ............... 515 Ice Pick—with spring handle ...................-- 808 Ice Sled—make and sail your own ....... ékcatte Ee Incense Burner—electrical, eliminates matches ...... 248 Indians, American—ruins of fire reveal secrets of ... 25 Indians, Navajo—sand paintings shows dance of four BE 5 co ee ht a ta paw 60k 00 00s sc etherts sum 84 Ink . drawing lines with a ruler in ...............-. 156 i és oh. 00% oo occ o nus Ue sans oowewes 433 red stains on marble removed with lime ........ 602 Inner Tube—what to do when, gets porous ......... 314 Insects ants fight fires to save their nests ............. 719 NY IIE... Set agli b 00ers edo caeee sons ei 600 flies organs of taste located in feet ............. 576 forecast invasions of pests to protect crops ..... 640 power-line poles of metal defy ant attacks ... 180 the bug boarding house ....................... 625 Insulators—million-volt electric flash tests .......... 553 Insurance extra-special hazardous occupations ........... 212 EEE eee 737 underwriters’ laboratory tests ...........:..... 434 Inventions how some of the world’s familiar looked at birth.. 750 women gaining as inventors patent records show. 568 Iron, Electric—easier to push when chromium-plated. 977 Ironing Cord—holder for ............:....:eeeeeee 534 Irrigation auto valves in standpipes ..................... 342 pails help irrigate orchard ... ....1046 Irrigation Canal—electric shocks keep fish from. 432 Island—lost in South Pacific sought for eighty years. . See Jack—cranked at side simplifies raising car ......... 737 Jail—“telegraph-plan” to reduce crime 05 Joints, Wood—for the amateur . 9 .345, 516, "690, 858, ‘1027 Joists—nailing single-handed 694 K Kitchen Cabinet—folding, also serves as screen ..... 17 Kitchen Utensil—electric set has several useful aids .. 180 Knapsack—for hunters holds ammunition and food .. 753 MECHANICS INDEX, VOLUME LI, 1929

'e ee ee 295 SS 8 PPP TTT Peer 183 vegetable peeler on, helps reduce waste ........ 98 L Ladder ee 0 OOD oo ., .« cibw ies odeas ehbeaneee 1050 making the, longer ................ . 321 —— salt lake is planned to ‘water the Sahara.. 753 mag adjustable at press of button ........... 431 dust-tight reflector cover ................0c00- 959 floodlighting of movie theater draws crowds 708 EE . i0. 5.5.0 GUIS Velde cailcedeeebud 156 ee ie 314 latest beauty aid gith ChiWed dite dad evens reen 96 light cast from any angle phn Viadenxde wheels . 609 smi on athe sabbee 1orcsy..,cthe Be PEE ee 608 using as resistance i titi ak acisiatnaageems | 826 water tumbler substitute for night 856 NE I kd os, cn edad Gee viewae Samet 177 Language—for all nations ...................00+: 977 Lantern—electric flasher replaces signal ............ 224 Lap Board—has many uses .............ccceceeees 501 Lathes I EE Es as we ps aha ba eee ere 168 re ee Cee Gee Te on. iis lees cen aveneaes 509 preventing marks on work in ........... - 692 SSM, Lic a Ga aic cals di. dcduswdweoncund 688 MISS, die ch bi siees 2d caluuin Gs wade 875 ere 685 shaping in the .. Se ere a ee Se Six 172 Lawn Mower—manipulating on steep terrace .. .1035 Lawn Sprinkler—hidden, keeps grass green ........ 461 Leather I, oican aka Gates diese i cababuirs 426 sharks to yield profit | Din elttdl «bbctwi theta aciie 359 Left Handedness—index to, found RUNG. chk cree 975 Lettering Guide—for drawing POP Ci weiss cle meins ai 456 Lifeboats better, to curb sea accidents .................. 398 davits to throw farther from vessel ............ 989 that won’t sink holds many persons ............ 911 Life Saving en I TE NE © 5 one Oasis ca 8 Win '9-0 bb ube oe 777 buoy worn by swimmers aids in rescuing ...... 532 latest invention for saving lives at sea ........ 811 lung saves two from sunken submarine ......... 987 Light how invisible, serves to prevent crime ......... 399 is turned into sound by magic mirror ...... 14 living, a possibility scientist declares .......... 912 Se Me WEE 3, «5% 4.400 ote Oia b eas becous 177 Lighthouses are ee ee oink gduah ba plane rescues keepers marrooned by ice .... 711 sends radio beam to guide ships in fog ........ 460 Lighting electric “eye’’ tells when to light school 888 harmless luminous paint to light homes .. 457 masterpiece in, seen in store’s exterior ..... 731 trapshooting by SEE © pag i slo oc lll ale attela onl 812 OI goo FOIE che eeccrcccec code 148 Linotype—permanent line gauge ................... 525 Lion—on the trail of the mountain ... 946 Liquid—saving when pouring vit <b chee bee be 848 Lock—chain, releases gas to foil thieves 624 Locomotives—the latest thing in, abroad 79 —“ heavy, single-handed ............. 331 sport of rolling, affords new thrills 41 London—when the city’s “pie-crust” breaks - 930 Lubrication—fitting closes open oil hole ............ 561 Lumber moisture gauge for, aids builder 78 more uses of wood to reduce waste ........ 535 waste is reduced by thinner saws ........ 464 M Machine Parts—expanding and contracting circular. .695 Machines ee eee ore 339 screw, clip for catching work . ... 348 Magazines—rack for holds many back numbers .... 775

Page 10

10 POPULAR MECHANICS INDEX, VOLUME LI, 1929 Magnet—heat, hanging six hundred pounds from a

Nhe kids a 9)0 Karlie £5 Kat A> cause arenes vietd male elas 705 Magnetism—metal made to float in air ............ 32 Mail—air, delivered on fly into net ................ 207 Mail Bag—wheel carrier for ....................... 417 Manhole—ventilating with pipe and blower ........ 283 Manure—hauling in winter ...................005. 340 Maps mapping Canadian wilds from air ............. 927 Oe OE OE no. SEs 845s ise odeolees 460 sticks and leaves guided early sailors .......... 414 Marble—tred ink stains on, removed with lime ...... 602 Mask, Face—guards eyes and mouth of worker .... 968 Matches coated to reduce fire hazard .................. 976 when lighting in the wind .................... 683 Matrices—making stereotype ..............0.-..0. 1042 Measuring tape under sea_ measures distance to Azores .... 974 the d ter of and pipes ......... . 168 Measuring Instrument—rate of travel given by scale . 951 Meat—electric unit for making tender .............. 950 Memorandum Pad—and holder ................... 673 Memori lights in churchyard cross .........+-.-0-e+e+05 569 waving concrete flag is war ...............055- 209 Menthol—oil of Japanese peppermint is one of the SE I err rrry Pr ree tT 294 i Sa mixed with gold aids dental work .... 590 cement sprayed with, to make it waterproof .... 417 electro process for pattern of ...............: 447 future supply of periled by big demand ........ 797 gun drives pin through .............66+-ee0e0- 975 I ES coe ssc cose cltele dd oesisees 457 hard, rivals diamond for ‘cutting NR. tees «ee magic, resists wear and hardens iron .......... 466 Mechanite, na ob nk bape teeees oh ¢0-0eURl 415 perminvar” new alloy ...........--eeseseeeeees 112 platinum extracted from ore ........+++--++++- 104 steel has skin for longer wear ..............-- 708 the wonder metal (beryllium) .............-«+-- 603 Meteorology : 5 meteors tell wind’s course ...........--.+seee0s secrets of upper air told by firing big guns ...... 13 Meteors—rocks that fall from the sky .............- 570 Microscope—on spectacles held by PP i vase~ehevese 179 i of sunlight on produces odd taste ........ 4 aluminum bottle cap ....2°.....--.--eeeee eevee 622 float prevents skin on while DE uisk wovewoune 608 lifter eee re ee 464 “post office” serves auto patrons ............-. 49 tree in tropics gives like that of cow .......... 433 Bottle ress i Gee 8 BOE. 6 nico vice. vied ceawees 341 wood fiber for, replaces glass. .... 624 Milk Cans—spiral tower loads, saves hand labor. Pe Milling Cutters—clearing Oe 6o4 Seca ds sem odee esas 693 Mines and Mining refrigeration to aid workers ................04 777 rich of Montezuma still yield treasure ......... 969 Mink—shipping crate .........-cceseeceeeceesenes 457 irror : EE eee eee ee eee 431 handy, for inspecting corners ..........++.+++. 680 magnifying eye, aids in removing CR sutton wade 94 Models é better wings for model airplanes ............... 1043 electric train which obeys voice ................ 376 of Chicago’s water-sup pply ER ee eae 992 of home aid builder and buyer ................ 823 wild life is preserved in glass cages ............ 908 Money new designs on paper money ..........-..-++- 446 os million pennies a week used by big store ... 599 like volcanic ashes temperatures show .......... 637 rocks that fall from the sky .................... 570 skating on frozen alcohol possible Ee 401 Motor—spark plugs often cause of missing . .. 330 Motor Bus—combined with trailer has om apent .. 206 ES | er rr eer 640 SE "Sa ck SSS bbe s a enee eee re bees dacees 104 Motorcycle hydraulic-brake, has auto features .............. 189 leg shield for, allows engine to cool ............ 40 I Soe 5 da cae ang ones ap pe 2.40.9 i.5 . 629 run by rockets planned for high speed mada ... 266 Motor, Electric—pumps oil from well ........... 89 Motor Truck—rotary plow on, keeps snow from roads. 531 Moving Pictures auto truck serves as theater .................. 98 by wire or radio from single set ............... 928 cabinet for home motion-picture projector ...... 241 camera aids talking pictures ................... 926 coin-in-slot talking on, Se 4 i. ene eas mania 792 electric shocks direct actor in talking films ..... 721 fade-outs in amateur movies easily made with disk 709 film shutter stops flicker .. .. 801 home movie and radio play are linked together .. 616 i Ons Siete 36 in three dimensions by new screen ............ 798 make-up IIR ans. aoc 6:0 one <ocibiges 986 movie voice follows actor in screen movements -. 425 of beating heart to aid doctors ................ 752 of city INTE Cb c0.din's-+.0\ 0c 5 a0 van aed 785 old movies feature travelling | circuses pee hie ctng ah 289 on the trail of the mountain lion .............. 946 outdoor talking movies aid politicians unig ibecas ae polar bear proves good “actor”’ in talking movies. 637 revolving merry-go-round films card Cs 231 screen for SRS. ees 1025 table top as movie screen ..................... 109 ren aanens 208 jam movies made in home ................. 552 alking movies sent by radio ................ 433 pame tower for, aids cameramen ............ 184 BRS ons 5a otis ce didirn t's bea. a's 1023 Museum—keep specimens by freezing for Russian ... 253 Music—the “inventors” of Tin Pan Alley .......... 74 Musical Instruments banjo and ukulele in one ..................... 223 harmonica played with roll ................... 95 improved fk PS SI ee pee 841 music is played by alphabet .................. 958 N nape cee chal OCLC CLE CEE EEE EE ee eee 738 Navigation—dry-land sailing teaches cadets ......... 4 Navy, German—new styles in battleships set by 959 Navy, Ss. NE 6c SS GS-7 sax. bume Ne CoN oo. Me 632 airships to have trapeze for catching planes 183 crane lifts sunken submarine ................... 987 Needle—threading a darning ...................... 141 Neon—-signal saves current on electric appliances ote ae Nicaragua Canal—to save time in shipping os ba Bs 798 Noise—the art of making Tr Nursing Bottle—holder ter, ‘fits on high chair ..| |_| 695 Nut—substitute for small .......... 1045 Oo Oats dust treatment for curbs disease ............... 14 i Ce coc otter fe ce) Aer Wee 873 Occupations—extra- -special hazardous roe 212 Ocean—shotguns fired under, to measure its depth’ . 440 Ocean Current—bottles help solve mystery of ...... 884 Oceanography charting ocean with echoes ey ois 6 ee 206 mountain ranges under sea found by echoes ..... 531 a Supplies—hand envelope sealer ............ 240 Oil from ships kills birds Rp aaiadatelnalieaed 6 9x 241 heat process to recover, from sand tae ore . 266 in burning tanks, fire old cannons to save ..... 41 Gi OP emee BOOMs Bes . . .. oc nw coc cece donee 359 Oil Cups—safety covers EE CO ES OF 347 Oilstone—taking care of your ..................... 518 sy —_ samrts from, give high heat cubes 81 il W »— FF NE I ener 1 760 fire put out with snuffer .. Folk das Kipiaie 198 piliar of fire marks first Australian e ‘diame ae seven-inch motor pumps oil from abs eee a0 89 tunnel diggers fight fire in .................... 119 Orchard pails help irrigate .......... PA. F4 1046 sheep dip keeps deer away jue... cele 296

Ore Orr Ou Pac Pad Pai: Pia

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Ore—taidio used in prospecting .................. 367 Ornaments—of wood used as substitute of carved deco- Dt Wiehtiadekeb wate ehe Cidawedectdboédmes 182 Outboard Motors—“pepping up” old .............. 839 Oyster—breeding in tanks to increase supply ....... 710 P Package Sealer—homemade ....................... 173 Package Tyer—uses bands cut from inner tubes .... 267 Pad—inflated for hard seats ..................04-. 289 Paintings wapert believes old master worked from reflection 532 oil, needle tests for frauds ...............-.+05 544 I DB og vo cc et csc ccsdewct ioe 368 Paints and Painting air-driven tool smooths concrete for ............ 109 a OS SS OD ree 766 best for radiators found by tests .............. 986 finishing plaster walls with ................... 503 fluid mask keeps “_~ 4 from car windows .... 368 harmless luminous, to light homes ............ 457 lacquer guards auto from sunburn ............ 31 painters risk life on St. Lawrence river bridge. . 817 plastic paint made from white lead ............ 510 ME Cb03066 450s 0042 6 cesnencdues 170 rigging boatswain’s chair ..................... 688 secret of Japanese lacquer guarded for ages .... 73 spray gun operated by automobile motor ....... 423 tape used for decorating furniture .............. 847 vinegar as substitute for oil in ................ 155 EE. Vu ovo aa whe hs Kandy soneneeh 860 false bottom in, prevents burning biscuits ...... 315 Paper asphalt, the latest magic for your garden ....... 868 NN OU III inka dditipic eg onesee ss cecccetn 816 detects gas leaks, avoids accidents ............. 269 press for printing and cutting boxes .......... 937 used for blasting after chemical bath .......... 491 Paper Carton—knife to open ...............-0000s 183 Paper Cup—holder for conical .............00-.05. 1017 Parachute—has metal ribs to aid in landing ......... 541 Remeenner BOUIN BUMER coc cc ccc ecw cee scccccscsses 1035 Patents inventors break old records in number Ear 180 women gaining as inventors records show ...... 568 Patterns—electro process for, eliminates shrinking .. 447 ture dikes keep concrete moist ...... 867

Peaches—best time to pick shown by tester Pedestrian—signals worn by, to avoid auto accidents .. 939 Pencils and cigarette lighter’ combined ........... joes nae es. oS caghaatap give sss saves eo 764 Percolator—how to clean an WMA... ceandiviccs 325 Perisc: EERE HSA ee 425 Petroleum—stove small as watch bakes oil rock .... 926 Phonograph and radio combination Seen t kkae ve ee ook 653 cardboard makes sound box ORS ee 600 Photographs—novel effects from snapshots .......... 674 Photography books at three cents each seen in Camera process. 257 cabinet for drying films and prints ............. 022 camera aids talking pictures .................. 926 enlarging small negatives ..... diet cba S a .. 682 ST IED, os. po obs cscs csssccesvews 666 holding films for drying ......:............05. 1021 home-movie film enlarger ...............0-.00- 731 hunting goats with camera requires disguise aaa, ne large-size electric printer ...............0.-40+- 689 of sound helps improve NIN 5 isis dak vasinn os 254 photos serve as sculpture for bridge statues .... 423 prints from wet negatives ..............--+++. 692 ——_ single sheets of photographic paper from short- stopping photographic prints — split-second shotgun photos show firing results .. 286 tower built to study eagles ................06-- 189 travel of flame from explosive snapped by camera ho IN 5 wlivn d6 as Us back O's doe nae opaddd a ckhes Se SE Pepe ore Por rere Hs use of slow paper wheu enlarging photos ........ 847 Piano Ne A GN TRE hoa eik oiiinis fork co cc ee esencd 872 has built-in cabinet to protect music .......... . 392 Se, Se GED oo wo eo ve ewe i caine cee 296 POPULAR MECHANICS INDEX, VOLUME LI, 1929

Pictures New England rock mystery solved ............ 810 novel effects from snapshots .................. 674 EE ot Us she amends nace tcban 250 : radio, process enables in colors ................ 904 Pie-Tin—holder for hot tins ................... «a 84 electric toaster thaws out frozen ............... 149 ae NT ae tk ea 341 Pipe Lin electrically welded to prevent gas leaks ........ 993 flanged pipe for welding ...................... 14 Pipe, Water—repair for leaky ................ 848 Pipe Wrench—has grip like hand and doesn’t mar work 4 Pistons—rebuilding old with bronze ... Plane Guide—detachable, aids in squaring work .... 3a Planer—taper attachment SL Rely ul sas 4 daleb as aalch 174 PE Ps cons cnwknre.cwideadeneestsaen 695 Plants breathe only by daylight tests show ............ 412 Germ spray Touts pests ...... 1c. csecscsscene 808 growing tropical, in VUNG OOM 20... 550s . 139 making transplanting easier .................. 683 rubber, to make pay is real problem .......... 776 a. Lb. . ere ae 359 spread pollen by electricity ................... 417 . .., - Serle rsineiiton.< 846 Plaster—sifter for building sand improves .......... 63 Platinum—extracted from ore by new process ...... 104 Pliers kink for preventing marks with ................ 147 ee Ee ee ean 602 safety catch for, prevents slipping ......... 944 Polish—a good silverware head GN £0 bs wa ba Bios 333 Polisher—and sander also runs drill. .........|| | 953 EN “dies 5 510 Da%Ge <b-Cie sod ib sae es ace 170 Popcorn electric popper salts and butters ............... 104 paper cones for, keeps fingers clean ......... 199 Porch Columns —method of alining caps and base CE MEE, Sas Sock st ubstccesbeecssti 864 Postcard—made from fir tree ................ 753 Potatoes (dR OEE PORE Pe 119 gas treatment for, causes early sprouting ....... 414 Poultry - A SR MN nt te hn be bie oe 4 3b Dds 492 coop made from old flour barrel ............... 679 _ ££ eg | RRR RST eae 341 Power Line—poles of metal defy ant attacks || | 180 Power Plant—electric eyes replace men at ......... 575 Prayer Wheel—run by wind ...................... 358 Pressure—artificial, eggs are “boiled” under .-...__ 409 Printiok lightweight plate substitute for metal .......... 257 2. “PR | af pene, 174 press for paper = Mu Vibes cal Dc Be otal 937 type set by telegraph automatically ieteal 441 ints—guide helps trim curled .............. 848 Propeller, i, biedea be bled ie kek hengees Ubadieceket 4 Protractor aids draftsmen’s work ........... PP tae s+ 1046 improvised, is made from two scales ......... -. 338 Psychology—machine help choose career ......... . 208 Pulpit—like vessel’s bow .................... cose OD Pump increasing the lift of a hand suction ....... ...1054 of few parts invented by invalid .............. 224 OS aid ince ce wad id wn 577 eas ee 502 Punching Bag toy-balloon held by vacuum cup .............. 959 i in ns nhas pe sinh n0b0-00e06«ogieeas te 630 Pusiecart—t0eG-BalAMCiMg wc ccc cccccccces 687 on | IN BE occa cctc cases vedvaaeee os nn Perret tee 679 R Rabbits—raising is nen RE industry in the south- PTT TT TTIPrrrriia VTi ee. Races—putting the run in ‘running horses L aes .... 898 Radiators best paint for, found by tests ................. 986 table on top of, helps protect walls ............. 810

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12 POPULAR MECHANICS INDEX, VOLUME LI, 1929 Radio bench for Spanish cabinet cutting down resistance stages handy resistance clip helpful hints from experts hints and kinks for fans improved, for planes adds to safety ae bea ORO in the arctic ...... latest from the radio. shops ; mystery of echoes perplexes engineers new parts for screen-grid circuits new things seen along radio row .............. new unit of many uses .. past, present and future shopping tips for fans ...... “signing off” heroes of the “SOS” ............ solve mystery tips from the laboratory travel beyond moon echo tests show ... using lamps as resistance units .... what’s new in Radio—Aerials airplane equipped with three-wire .............. attractive lamp forms captive balloon oe | RS Nias. dca ues clamp for a rs Pia ai loop wire tightener | eee ee eer eres: one antenna serves two homes ................ switch for short and long antenna .............. Radio—Amplifiers advantages of push-pull heavy-duty chokes for new power units Radio—Apparatus—double resistor saves space Radio—Applications automatic sea beacon has wide range big searchlight sends code by radio control cabs commanded by radio electric set to teach deaf facsimiles speed news reports helps find motor sunk in lake lighthouse sends radio beam to guide : ships in fog B - ore prospecting by Process enables radio pictures. in colors radio “echoes” locate ships at sit radio helps to repair ship at sea .. radio record on dictaphone speeds news reports. sign-board that talks ‘song sent by photo across a oe ee squeals may save airplanes in fogs ............. talking movies sent by radio the invisible man hunter ..... war tank is run by radio from moving plane a ash Radio—Batteries A-supply from farm plant ; charging panel for Edison- type “BR” charging wet farm charger for .......... a Redio—Breadcasting ; ‘ an experimental microphone .........-...--.--- bear cub is announcer .. improved “police” watch radio stations Radio—Coils ’ making short-wave coils varible resistance replaces filter Radio Compass—for small ships Radio-Condensers wh voltage by-pass ... homemade aerial- as testing filter Radio—Construction adjustable subpanel brackets selectivity with one dial Radio—Eliminators A-unit employs three-ampere bulb automatic A-power unit : automatic switch from Ford cut-out .. compact a.c. converter “eee new combination A-supply new rectifier for A-eliminator Radio—Installation an improvised lightning arrester handy kink for set builders hints from the laboratory model of rocket airplane controlled by removing insulation from leads . simple ground clamp solder in tape form Radio—Loudspeakers a handy Geshe dé : simplified dynamic ‘ automatic dynamic speaker control battery of horns for sound effects ‘ battery-operated dynamic, converted to power _ * "pa peed compact power amplifier for dynamic kink for cloth-speaker builders ... . placing the . stand for the dynamic speaker Static speaker new radio marvel Radio—Receivers a screen-grid short-wave adapter .. — combination radio and as ee eran ‘ correct coupling for .. curing noise in set 4 four tube set operates dynamic speaker homemade phonograph pick-up how to add regeneration list of blueprints for Popular. Mechanics tested ME ne os a at o dda oy Za new Hammarlund-Roberts a.c. ot anh ae operating a.c. apparatus on d.c. supply hk SGseakatna set built on bicycle ... set disconnected by alarm clock television, run by fan motor Radio—Reception curing noise in set ....... device stops man-made static double-impedance amplifier unit filter prevents power-line noises greater selectivity for the old set grounding of transformer cases eliminates hum improving tone quality ib new hum- control unit output filter is important , overloaded tubes cause distortion ‘ reducing interference from farm lighting plants ‘a regeneration necessary for DX j shielded lead-in wire reduces interference ........ tuning changed by power unit WS ee wiring suggestion for apartment building awe es Radio—Repairing a sensitive - tester push-pull amplifier kink Radio—Television cell board has many lights combination power unit for ; moving pictures by wire or radio from single set photo-electric cells of new design projecting pictures a red-head actors found best for . reflector for the neon lamp . « Radio—Transformer—rebuilding burned-out Radio—Tubes adapter for two power ey checker operates from a.c. line grid bias for heater type a.c. tube heat in voltage regulator a how to improve a hissing tube .. new power tube for a.c. sets operating hint for a.c. overloaded cause distortion two new 9 unit protects a.c. tubes . Radium “clock” to run for centuries is fireman in rubber plant seek curb on deaths caused by .... Railroads auto roads over railways to relieve congestion .. detector for broken rails dining car without wheels serves as school i engine half a block long game board traces trains giant timbers are shipped on special ‘cars jolt recorder for, aids smoother riding latest thing in locomotives abroad levers stop train to prevent collisions light rays control train A model railway which obeys voice night train signal on track robot rides trains to test engines school on wheels reduces accidents sleeping in upper berth means longer ride steel container freight car steel rails to the midnight sun Rai Rar Rat Ray Ray Raz Raz Rea Ref Rob Roc Rol Roo Rut Rub Rub Rug Rul Safe Safe Sahz Sanc Sanc

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Railroads—continued tractor is motored by auto engine ............. train on one-man railroad run by auto engine .. Rails—fiexible work-rail track simplifies curves ‘ Range, Gas—glass-door cabinet for, stops smoke and BS Nitighin ad ad ege 650 25 ops: Rats gas attack routs ... bee keeping brooder house free Sibita. ds hedsctares Rays, Light—control train to prevent wrecks ....... Rays, Ultraviolet BAe SII, Lis SECS WSs 60 0b bs 68-00% from sun now on increase .. Razor—blade serves as knife = holder Razor, Safety—roller guard for Reamer—wedge tool centers ... : Reaming—brass and bronze bushings ee Refrigeration automatic air-cooler cabinet for home .. in deep mines to aid workers ‘ Refrigerator burns oil, saves expense ..... freezes corn in field to improve crops autuk ice cubes formed in tray . Religion—prayer wheel run by wind . I GREE GB. 65k isk ots cowie ccweccews River heating with steam prevents freezing lifting out of its bed River Control—taming the father of waters Riveter—for motor cars ............. és Roads auto, over railways to relieve congestion . pipe track for auto trucks aids construction work. rough roller for hard ......... Robots rides railroad to test engines .. that walk and talk .. ; to pass circulars aid advertisers ‘éimiiebn Rock—New England picture mystery solved ........ Roller Skates—speed phones in early hours device for straightening roof boards easy method of patching shingle screen keeps gravel out of gutters Roofing—used as floor covering ..... Rubber from oil shale to cut cost .. plant found in Madagascar yielding more radium used to prevent fires in plant to make plants pay is real problem .. kaws Rubber Bands—small containers improvised from ... Rubber Stamps guide for, on tracing cloth ........ jointed grip improves . : Rugs easy test for antique ....... serves as game board .... Rule—hammer serves as Safes—small, carried in auto .. Safety Devices and Measures better lifeboats to curb sea accidents . Tat crossing gates operated by approaching train .... death’s head in red lights warns drivers .. driver’s tests save lives ‘ face mask guards eyes and mouth of worker . gate stops autos at rail crossings : ; levers stop train to prevent collisions ee light rays control trains to prevent wrecks .. lower lifeboat on track movable stop sign guards school children . night train signal on track push-button traffic sign aids pedestrians igo rough roller for hard roads to stop skidding safety bumper for autos and street cars . signals worn by pedestrians . steel net on oil derricks helps prevent falls submarine invention , too-late sign for pedestrians what’s needed for sea safety? .. aa Sahara Desert—vast salt lake is planned to water Sand—heat process to recover oil from Sand Blaster—washed air in helmet guards

POPULAR MECHANICS INDEX, VOLUME LI, 1929

13 Sander—and polisher also runs drill ............... 953 Sanding—on the lathe ...........4......... .. » 685 Sand roeing saan shows dance of four seasons .. 284 Sap—is pulled to top of trees by tension inside of trunk 190 Saws and Sawing a ball-bearing scrolisaw .................000005 $11 dadoing on small power o dtcwaas tennats 335 endless belt on auto does six men’s work ....... 49 uae Sar GOMEOF GOW... . .ccccccscboon ssieone OOM length of garden hose is handy ; arm protection when filling le awtetioreat wae vibbis stanton 4th 688 lumber waste is reduced by SO 5 chocvszowurs 464 metal rod at an angle .. ee ee 693 power hacksaw for small shops. Sian ae 0% -1051 power, made from buffing head shai vuteanswuee screw-slotting hacksaw blades P 684 sewing-machine head and small motor used fo make circular .....;.... ‘ 840 weighted saw cuts faster ...... ase. bit Saxaphone—trimming reeds ... boos se Scales—how do they get that weight? eeoeunaw <ts'ae School—electric “eye” tells when to light .......... 888 Science ND CIR sl, wath «oaliciseeecewnwe 536 hanging six hundred pounds ‘from ‘a flame aputbon 705 the world’s queerest jobs ................ 562 Ee ees 881 where men defy death .................... oo Scissors—magnetizing a pair of ae Se aS ltl Scooter—skates for child’s ...................0. .. 776 Scraper—has hooked blade for better results ........ 224 Screen Door—improvised hook for ..... «tite sata oe Screws——simple gauge to test a sled ieoat 9. nn a eal ieee 950 Scriber—multiple, surface gauge ............... 515 Searchlights on farming equipment for night work i 3 sends code by radio control .. : a 616 Seats—hard inflated pad for ...................0. 289 Seaweed marine “lawn mower” keeps harbor free from .. 366 padding in airplane decreases noise ... i oae eeds counter counts small Piven sgite apg ecn infoael 248 live forty years in deep soil .......... indienne sower for small gardens ...................... 985 Sewer city’s aerial line substitute for tunnel .......... 284 cutter removes tree roots which clog .. .. 759 Sewing Machine—small-size, carried with one hand.. 728 Shade Cords—ornaments for - 812 Shaft Coupling—emergency, made with belt lacing ws 192 Shafts—fixture for removing pinions from 1047 Shaving Accessories brush holds soap and styptic ... badecuneess Ge brush with tube of cream for handle ... .. 249 SE DE OS are 758 roller guard for safety razor ........... 989 Shears bar cutter for rescue squad 961 small motor-driven shuttle shear for cutting | sheet rae er een 865 power, made in ‘small. shop ieuenses rer Sheep—raising karakul fur ... onccee SEE Sheet Metal—small motor- driven shuttle shear — Ship Model—the “Flying Cloud” contest ....... . 326 Ships and Shipping art treasure ship guarded by destroyer escort .... 764 automatic sea radio beacon sade Se davits to throw lifeboats farther ‘from vessel 989 fitting a new rudder to “Olympic” ... opp. 705 funnel of Italian motorship one of world’s largest 400 giant liner to be driven by electric motors ...... 728 heroes of the “SOS” . 648 in 1819 the first stearr ship crossed the Atlantic... 953 land ship aids training of students ...... . 757 oil from, kill birds .. : a ae ee ee 241 plane solves sea mystery e200 cv es htneivatsl 560 pulverized coal to run ships aOeer cy con Se radio compass for small seek — | radio “echoes” locate position ‘at night ed radio helps repair ship at sea oy TSG eas pe ... 816 sailing ship is picture queen errr tT ship feels earthquake ds dal o'gpraa nica straight lined reduce seasickness .............. 279 tests with model rudders aid my Wearguwiicn «ated tug launched by crane ............0...++05- - fae what’s needed for sea safety? ..........66-0405- 6

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14 POPULAR MECHANICS INDEX, VOLUME LI, 1929 Shipwrecks latest invention for saving lives at sea what’s needed for sea safety? Shoelace—lock tips for oes half soles made from old cotton belting have special system of ventilation splash preventer for high heels wooden mud Shoulder Pads—made from old auto tires 50 Shovel—mammoth electric being built to break all récords 61 Shower Bath—cabinet fits any room Siding—bar for removing Seay “no-smoking” in twenty languages novel for roadside pop stand novel “hot-dog”’ novel swinging radio signboard that talks street names on curbstones Silk—renewing Silverware—metal plate polisher .. Singapore—more than fifty languages spoken in .... Sink -how to tell proper height of Skates—racing blades fitted to clamp Skis German boys traitied in running on the sand with 41 motor, at Swiss resort ... 561 training new German army to fight on Skyscrai " fire tests fighter’s skill roof-bungalows on top of . Sled—rocket-driven makes high speed Sleep: Bag—combination shelter and Slide— Rn. we ~ for the children Smokers’ Accessories ash tray delivers cigarettes at press of lever .... combination cigarette lighter and pencil combined case and lighter .. lighter fits in lamp socket swing ash tray saves room .. Smokestack—sling for working on large Snow—boiling water clears street of Snowplows loads trucks saving handwork rotary, on motor truck Snowshoes—make your own Sodding—a hint on Soldering dry gas torch needs no generator electric arc iron uses little current quickly made acid vacuum cleaner supplies air for torch Sorting Machine—for nuts and bolts Sound Waves controlling “‘dead” rooms best for speech tests show light is turned into, by magic mirror photographing .... ae ark Plugs—snap terminals for eral a arn on, held by clip . rate of travel given by scale .. what price? Speed Indicator—improvised ; Spoons—“‘mountain”’ built of, for Leipzig fair ... rts chemical skating rink .. log rolling affords new thrills boner about maze outdoor sport in Sweden Sports— Horse Racing—putting the run in running 898 horses Sports—Track—starting frame for racers Sports—W ater forty-acre swimming pool wannane hazards golf played on pond ..... Sports—Winter make your own snowshoes .......... motor skis at Swiss resort .... Spray—repairing bath .. Sprayer—automatic, for cleaning clothing Spray Gun electric, run from light socket run from auto Sprinkling Can—novel, used to fill radiator .......... Stairways—to prevent "accidents on cellar Stam ecorate room with, valued at thousands homemade rotary Sane Collection iecorate room with stamps printer’s error adds value to stamp Stationery—hotel dispenser reduces waste | Table—and coffee urn single burner for advance of, shown in contrast size of bridges .... compound ‘for drilling hard spots in has skin for longer wear . magic effect of color keeps steel cool non-rust for building Still—in hospitals help curb disease . Stock Market—two hours behind the market ae Stones—germ that eats Store—self-feeding shelves Storms-—detector warns of, to increase power Stoves an outdoor glass door cabinet for, stops ‘smoke and odors .. kerosene burner for . small as watch bakes oil rock toasting on coal .. Stoves—Gasoline—“ethy] gas” Stoves—Oil—wick cleaner for Straw as building material poultry house made of ...... Street Car—has auto springs and wheels : — Cleaning—self-emptying trucks speed treets names on curbstones easily read when the city’s “pie-crust” breaks Stumps—cheap puller for Submarines better lights for, to reduce accidents ... inventors save sunken ... lung saves two from ocean’ s depth rescue, has an underwater exit ... Sugar from cornstalks seen as future food from peanut shells , Surfboard—run by motor gives water thrills ........ Swab—for applying acids Swimming buoy worn by swimmers aids in onsen forty-acre pool reduces hazards .... Swimming Pool—a backyard Swing—truck casing makes novel T Table ad dining and billiard combined in one rubber top protects storing asbestos mats .. Tape Line—kink for using Target—towed by airplanes for anti-aircraft guns Taxidermy—wild life is preserved in glass cages vate Telegraph photos sent by speed up business .. type is set by, to speed news type set automatically by .. wires connected on pole Telephone — new word to describe efficiency daily phone-call increase is eleven thousand double earpiece for, allows two to listen .... loud speaker for, leaves hands free roller skates speed service in exchange .. special clock for, saves extra tolls wires connected on pole .. Telescope giant, planned for California college ...... huge, to reveal many new stars Tennis gun helps players practice racket string guards help improve game weak cee string tightener on racket Thermometer—on tall tower visible long distance .... Thread—depth-indicating gauge . Tide—movie camera under sea records action of cannot be used in....

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1. 282 . 284 ae : 686 . $32 7" 1030 | 315 lle color-glazed building, easily kept clean wood-pulp board substitute for ........ 49 Toads—horned, raised for zoos and to protect ‘farm as SN ie eed csr k the oe tr et Oi ys e es ccuabes oes Toaster—electric, opens up like a book .............. 432 Tobacco Chest—that you can make yourself ........ 135 Toboggan—motor, holds four ............. aes setes 88 Tool Box oe. ie seared Verde se wwe 519 ard aw wh v0 650s e 6-60 obs balm 340 portable for beekeeper ...........6.-.00-0e0eee 169 Tool Kit—in handle of hammer .................... 974 for transferring hole locations ................. 878 rack holds tools of many shapes ............... 1025 thread tool forms straightedge ................ 874 es eh a od iewesrecvercesst 1049 two useful tools for home mechanics sso ee vertical milling head fits all fypés of machines ... 233 Toothbrush—spring-motored for pocket ............. 618 Tornadoes—the storm king’s challenge .............. 994 Tower that sings to ocean built in Florida ............ 78 thermometer on, visible long distance ........... 24 Towing—tow bar steers towed car ................. 874 T galloping pony for children gives end exercise ... 926 midget size shooting gallery ................... 46 Se NE OUND oo i ccc ccnsccvencecees 843 ee I Si oc cns 6's isin} cue! s saree went 323 Tracing Cloth for curtains admits healthful rays 569 guide for rubber stamp on satdbanedl 876 Tracks—flexible work-rail, simplifies curves.......... 283 Tractors armed with cutter helps reclaim desert .......... 295 big crane on, speeds swamp work ie de waa 984 for railroads is motored by auto engine ........ 906 non-stop, runs seventeen days .................. 112 power plant from a A 329 SD GUNNOR osc ccccccdvecccscaseens 867 Traffic odd two-level auto bridge relieves .............. 907 operate electric policeman by sound of voice .... 409 plan underground auto park to relieve Paris .... 279 policemen of the world ................... 107 push button sign aids pedestrians SR rents 272 sidewalk lanes for shoppers .................... 408 too-late sign for pedestrians ................... 735 two-level streets planned to speed Paris ..... 599 Transformer—clamping laminations ............... 346 Trans tion all under three feet ride free in busses .......... 593 joint rail and bus service .............. 544 Trapdoor—fiush handle for ..................0..05. 515 Trapping care of animal traps ..... baoetaees 876 trap catches animals alive in wire » bag cep eee 735 Trap Shooting flying target replaces birds .................... 56 night is turned into day for shooters ........... 812 portable trap aids outdoor sport ............... 542 Travel—town’s history under roof .............. 426 Trees ss . giant timbers are shipped on special cars ....... 775 ES Se aed kd bho 0 bse case eels ee 278 Row Gp GOW, Gwe qn 5.5.53. eer ccs sce cccccee 681 immune to disease yields edible nut... 736 in tropics gives milk like that of cow ie id sap is pulled to top of, by tension inside of trunk = transplantation of, aided by drugging .......... 69 truck for trimming, has aerial platform . 890 Tricks ES reer errr or 467 ST EEE. is 5.d.ot Wewvws coccegevsceanb 494 TE Sea UGS 6th ody cacedsebst cdbeveates 290 ee os eos corres on eens civaeaheus 641 easy with dice cst Jeauvsnadescbseduds kteeu 113 you can learn to juggle earl eee duno 4 adie awe 850 Trucks ee ee Oe ee BOD ..... oc ccccdaspevsscees 343 Es co cktinsc ce eudeee $e eébe vee 112 Tunnel electric “eye” to count autos using ............. 730 mysterious, in China may lead to treasure ...... 368 new plan for English Channel.................. 767 Turtle—soup from the sea.............-sseeeeeeee 962 POPULAR MECHANICS INDEX, VOLUME LI, 1929 ers cardboard, for holding balls .................... pull with spring to reduce pain .. Setting—by telegraph to speed news ters 8 I eee repair for loose platen tool roughens roll to prevent slip U Ultra Violet Rays admitted by tracing cloth ........ Underwriters’ Laboratory—adventures in wonderland Vacuum punching bag holder rae Vacuum Cleaner—supplies air for soldering torch . Vanity Case—in a ring Valve Spring—grip for pute ale Rave oll Vending Machines—fresh fruit dispenser ag sini ewe Ventilation electric air cabinet keeps rooms healthful .... fan for manhole . fan hidden in chandelier improves - preheating cold air for furnace draft .... Vise—pins hold circular parts on . Side Vision—new theory offered by Sir Oliver Lodge 569 434 634 Voice—fifteen million talk at once to equal horsepower 889 Volcanoes , predict eruptions by study of averages sixty-five are active END 55. cctvenhes tadenssemieusainxe alin—wey we walk in ‘circles hibdewexeaks our Wall ae machine for papering walls . preventing penetration of paste. . finishing plastered, with paint ... : hollow, deadens sound more than sawdust repairing leaky cellar eves R Walnuts—auto used for hulling ... eR: Warehouse—in cave for storing potatoes rt ee Warfare repelling attack on London in mimic war ...... war tank is run by radio from moving plane . Warfare—Aerial heat bombs for air raids ..................... invisible walls hung in sky to foil en War Maneuvers—motor-driven gun battery aids . Wash Boiler—protecting bottom Washing Machine speed-shift, does better work ............ “whip” for, saves times and — Pineatined dawn Wena from farm Waste Paper—a burner for ... Watch Fastener—vacuum Water—purification with silver Water Bag—substitute for Water Pipe—guard for house prevents freezing anet Water Supply—model of Chicago’s system cay Water Tower—to guide flyers by revolving lights .... Water Wheel—to super hydro power . ; Wax—melting rods for, heated with curling iron .. Weather arctic station speeds cold forecasts pai tn moon has no effect on crops bureau shows mystery of changes seees See OP WUD oo kd astansies 400% eehonvees static harnessed to aid in forecasts . the storm king’s challenge what you should know a when is it really cold? ° Weights—how do they get that weight? ae ars. Welding care of oxyacetylene tips Ragnar 624 . 465

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16 POPULAR MECHANICS INDEX, VOLUME LI, 1929 Welding—continued flanged pipe for, makes stronger line ground clamp for electric method of building up broken parts in pipe line to prevent gas leaks silent, on hospital addition Well artesian, water from heats rail station .... safety hook on digger’s rope Whales—storm “shipwrecks,” on Africa coast Whaling—modern methods of .. Wheel Chair—rocker becomes, with folding truck ... Wheels boxed wagon for mud roads .... bull, quick repair for .. Winch—new type for observation balloons Windmills “barn-door’’, harnesses the desert winds homemade remote control with six sails to generate power Window Box—better window gardens Windows anti-burglar catch on . boxes anchored to cellar wall ornaments for shade cords ..... sliding sash swings in to aid cleaning that tip inward easily cleaned tighteners on sash keep out cold Winds—pressures exerted by Wire—-straightening fine Wood making plastic filler for more uses for, needed to reduce waste .. ornaments of, used as substitutes for carved deco- rations pulp board or tile rare pink, found in Zululand . removing dents in soft Wood Bits extension easily made threads on side of, help bore holes Woodworker—workshop without belts Woodworking—-three-surface sanding block fits and work Work—mixing nationalities speeds ‘production Workbench on front of truck simple vise for vibration stopped Workshop vacuum cleaner useful in the ... without belts run by single motor ..... Worms—given special make better bait Wrench improvised ratchet : socket, fits any size of nut X-rays—detect art fakes Zoo model mountain for goats tons of dried grasshoppers fed to ‘animals ge ; mE ‘ : Y Yacht-——mounted with gun for deep-sea fishing

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