# Popular Mechanics/Volume 49/Issue 1/Contents

An index to the contents of this issue of Popular Mechanics.
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Popular Mechanics Magazine 200 E. Ontario Street, Chicago, U.S.A. H. H. WINDSOR, FounderH. H. WINDSOR, Jr., Editor and Publisher
London: Hachette & Cie., 16-17 King William Street, Charing Cross, W.C. 2
Paris: Hachette & Cie., 111 Rue Reaumur
Melbourne: Gordon & Gotch, 509-513 Little Collins St.
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| Entered as Second Class Matter Sept. 16, 1908, at the Post Office at Chicago, Illinois, under Act of March 3rd, 1879. |
| Entered as Second Class Matter at the Post Office Department, Canada. |
Published monthly by POPULAR MECHANICS CO.Copyright, 1928, by Popular Mechanics Co.Copyright in Australia. Copyright in France
| Accidents—traffic, the most dangerous hour | 90 |
| Acrobat—Berlin, loops the loop on his head | 100 |
| Airplane |
| automatic steering gear increases safety | 33 |
| brake on propeller to aid in landings | 58 |
| British Schneider cup winners carry ballast | 4 |
| made more stable with vane controls | 54 |
| "sea flea" for ocean flight develops high speed | 81 |
| to fly straight up | 10 |
| Ambergris—wealth from | 43 |
| Amusement Parks—there's money in it, but— | 59 |
| Aquarium—used as rural church | 71 |
| Archæology—digging up Bible lands | 26 |
| Architecture—artistic brick buildings show German skill | 87 |
| Army—portable footbridge of pipe aids drills | 113 |
| Army Maneuvers—blanketing the sky with curtain of death | 95 |
| Art |
| models in glass | 15 |
| pictures chiseled in brass latest fad | 41 |
| Automobiles |
| gearless car run on turbine principle | 63 |
| springs as long as the car add comfort | 54 |
| striping made easy with pencil painter | 81 |
| Automobiles—Accessories |
| baggage carriers like car body | 46 |
| compressed-air jack operated by turn of wrist | 7 |
| disappearing bed adds comfort | 17 |
| folding luggage trunk serves as trailer | 98 |
| heated windshield wiper | 57 |
| map like roller shade | 119 |
| Automobiles—Driving |
| ball in tube tests brakes | 39 |
| "game" tests skill | 45 |
| limitless-speed highway in Italy | 9 |
| overhead straps warn of crossings | 40 |
| Automobiles—Equipment and Supplies |
| battery filler keeps water at right level | 99 |
| glare shade for mirror aids safer driving | 96 |
| Automobiles—Lighting—light shines around curves | 10 |
| Automobiles—Tires—air-service station eliminates gauge | 74 |
| Aviation |
| dummy flyers help make air safe | 104 |
| flexible-cable landing light prevents damaging plane | 64 |
| flying boat links Hamburg to London | 115 |
| life raft inflated by gas as parachute drops | 86 |
| to be helped by movies of air currents | 64 |
| Awning—adjusted to sun to protect goods | 88 |
| Basket Ball—without lacing | 16 |
| Blotters—black, for banks, to defeat forgeries | 7 |
| Bears—hunting with camera | 82 |
| Boats and Boating—rowing drill in one-man tank | 107 |
| Bridge—new $30,000,000 for New York | 57 |
| Building Material—excelsior blocks for homes | 109 |
| Cactus Apples—raised for jelly and candy | 46 |
| Cafe—in form of large shoe recalls nursery rhyme | 103 |
| Calculating Machine—solves problems too deep for brain | 15 |
| Canaries—that sing jazz gain in popularity | 115 |
| Church—ancient, built without nails | 55 |
| Cigaret—that lights itself | 9 |
| Clock |
| floral, helps draw trade | 87 |
| sway of high building stops | 103 |
| Cookstove—concealed in cabinet, reduces odors | 114 |
| Cotton—rival seen in ancient plant | 25 |
| Crime—rogues gallery of movies to help catch crooks. | 58 |
| Dance Hall—like monoplane is resort novelty | 79 |
| Disease |
| camera shows how eyes reveal | 63 |
| menace of fly's footprints revealed by microscope | 109 |
| weird image health guards abandoned in Korea | 120 |
| Doughnuts—cooked at table in electric mold | 94 |
| Earthquakes—thousands a year | 8 |
| Egg Timer—sandglass, rings bell when done | 78 |
| Electric Generator—giant "hoop" for, is marvel of welding | 106 |
| Electricity—electrical "man" obeys voice on phone | 5 |
| Electric Lights—plug in ceiling socket aids in cleaning lamps | 96 |
| Electric Power—load fluctuations shown by solid model | 112 |
| Elephants—royal Indian wear gem-studded robes | 41 |
| Engine—burns oil and water | 16 |
| Eyes—40,000 glass used yearly in U.S. | 25 |
| Fair—taxicabs and camels meet at oriental | 72 |
| Fingerprints—duplicated with machine | 103 |
| Fire Engine—tractor fitted as, for forest service | 3 |
| Fire Fighting—spray nozzle on hose to reduce damage | 99 |
| Fire Prevention—in the home shows good housekeeping | 100 |
| Fish and Fishing |
| catching big game fish from small boats | 73 |
| fish from tropics travel in luxury to zoo | 72 |
| the stickleback fans its young to supply oxygen | 106 |
| wrecking of old ships urged to improve fishing | 63 |
| Floods—caging behind steel and concrete | 47 |
| Flooring |
| low-cost parquetry, easily laid | 64 |
| maple, beauty shown by stain | 42 |
| Flowers—"sick" revived by artificial sunlight | 89 |
| Football—stop watch to end disputes | 115 |
| Furniture |
| is heavier in summer | 114 |
| toy cardboard, child can build | 120 |
| Garage |
| electric hands move cars in tall | 106 |
| in electric liner latest travel aid | 119 |
| Gas—to be made at coal mines and piped to cities | 79 |
| Gas Mask—efficient as diver's helmet | 7 |
| Gold |
| giant nugget kept by bank as reserve | 18 |
| that turns black, found in Australia | 63 |
| Gold Mining—eight-cent digger earns millions | 75 |
| Grapes—canning aided by stem remover | 89 |
| Grass Seed—"fiddle" that sows helps golf-course keeper | 4 |
| Guns—trigger guard prevents bruised fingers | 93 |
| Hay Fever—victims aided by pollen collectors | 65 |
| Hearing—tester of children's | 54 |
| Household Devices | 110 |
| House Plan | 176 |
| Hydroglider—steered by motors, to cross Atlantic | 96 |
| Ice—chemical used to freeze water pipe | 48 |
| Ice Cream—weird architecture helps sell | 101 |
| Imagination—putting to work | 50 |
| Industry—center of | 7 |
| Insulation—removed from wire by timesaving tool | 72 |
| Jewels—that aided Columbus valued at half million | 30 |
| Kite—shaped like monoplane | 119 |
| Laundry—uses steel boxes to collect packages | 17 |
| Life—oldest living things | 41 |
| Light—invisible used at garden fete | 40 |
| Locomotives—sixty-five years of progress in | 56 |
| Lumber—skylining our | 11 |
| Lunch Car—moved on giant casters | 48 |
| Mail—air, dropped from plane for forest patrol | 85 ​ |
| Mirrors—help deaf children learn to talk | 79 |
| Money—air driers speed output of | 96 |
| Moving Pictures |
| camera and projector take pictures on paper | 89 |
| of birds and insects teach flying secrets | 55 |
| waves made with boxes | 48 |
| Museum—Philadelphia art, millions spent on curves that fool the eye | 32 |
| Navy—U.S., breaking the world's big gun record | 66 |
| Occupations—the most dangerous jobs | 49 |
| Ocean—Monaco, home of its story | 97 |
| Oil—search for, leads to sea on California coast | 113 |
| Orchids—grown under glass rival tropic kin | 49 |
| Pansy—four-inch blossoms | 58 |
| Playground Apparatus—fire escape as child's slide | 25 |
| Police—models help teach street location | 39 |
| Radio—short waves cast shadows | 1 |
| Radio—Aerials—ball antenna kit | 124 |
| Radio—Applications—voice starts and stops train | 112 |
| Radio—Batteries |
| five dollars builds A-battery and charger | 121 |
| homemade fuses on cable | 124 |
| snap terminals on leads | 130 |
| testing kink | 131 |
| Radio—B-Eliminator—resistance C-bias for B-eliminator | 133 |
| Radio—Condensers—fixed midget easy to wire | 133 |
| Radio—Installation—efficient radio ground | 134 |
| Radio—Pictorial | 125 |
| Radio—Receivers |
| bunched leads for sharp tuning | 132 |
| controlling tone and volume | 133 |
| selectivity feature of aero-dyne six | 127 |
| superheterodyne kink | 132 |
| Radio—Repairs—trouble-shooting kinks | 134 |
| Radio—Tubes |
| light-sensitive | 136 |
| new tube is self-neutralized | 135 |
| output impedance for power tube | 131 |
| power tubes used as detectors | 132 |
| Razor—safety, blade moves like mower's | 10 |
| Reindeer—herds of Alaska to supply future meat | 102 |
| Rubber |
| longer life for, seen in new treatment | 78 |
| as upholstering substitute for springs | 114 |
| Saws—motor bone, saves work for butcher | 120 |
| Seasickness—gas latest cure | 4 |
| Sewage Gas—as fuel to drive electric generator | 94 |
| Shale—makes concrete light without strength loss | 114 |
| Sharks—ship hunts sea terrors to make shoes | 108 |
| Shaving Accessories—lather bulb replaces brush | 33 |
| Ships and Shipping |
| running a seagoing hotel | 18 |
| speed boat to cross Atlantic in four days | 8 |
| when a ship is arrested | 65 |
| Siphon—employs bulb to start and stop | 71 |
| Skin—registers emotions | 79 |
| Skyscrapers—have they reached their limit? | 34 |
| Sled—with roller runners speeds over bare ground | 74 |
| Slippers—paper, given to hotel guests | 45 |
| Smokers' Accessories—pipe cleaning set in holder carried like pen | 113 |
| Smokestack |
| kept dark to protect birds | 46 |
| outline hidden with steel framework | 57 |
| Snowflakes—icy jewels of winter storms | 116 |
| Statue—Lincoln shown as lawyer | 89 |
| Steel—better and cheaper, by new process | 103 |
| Sugar |
| from wood | 99 |
| used as medicine in early ages | 88 |
| Swimming |
| bathers' push wheel adds sport to | 88 |
| spinning wheel adds sport | 33 |
| Taxes—aerial maps cut city | 17 |
| Television—fashion designs by radio | 42 |
| Tires—faults revealed by superspeed photos | 81 |
| Tongs—to remove clinkers save coal and dirt | 14 |
| Toothbrush |
| rotary, aids dental hygiene | 39 |
| with replaceable head, cleans between teeth | 100 |
| Towels—hotel, are popular souvenirs | 120 |
| Toys |
| endless track for train, novel window display | 107 |
| miniature castle doll house | 17 |
| Traffic—street guide, at curve, saves extra police | 94 |
| Trousers—protected from storms by waterproof covers | 86 |
| Tunnel—ten-mile under-sea (Japan) | 16 |
| Typewriting—chart to teach, saves students' time | 112 |
| Umbrella—growing handles | 45 |
| Vacuum Cleaner—hand-size, simplifies housework | 99 |
| Voice—defects in speech recorded to aid speakers | 8 |
| Volcano—model is feature of exhibit | 25 |
| Washbasin—for industrial plant, pedal saves time and water | 57 |
| Washer—has even grip to defeat vibration | 53 |
| Wasps—raised to fight codling moth | 42 |
| Water Pipes—why hot freeze more readily than cold | 119 |
| Weather—insects are prophets | 107 |
| Weather Vane—grasshopper, honors business man | 64 |
| Whales—tagged to aid study of habits | 80 |
| Wood—walnut trees grafted for beautiful grain | 86 |
| Workers—produce more today despite shorter hours | 46 |
| Zoo |
| animals' health guarded by special weather | 74 |
| sailors' pets form collection | 99 |
| sight-seeing bus for small boys | 80 |
| AMATEUR MECHANICS ||
| Aquarium—top for | 153 |
| Automobiles |
| eliminating alcohol odors | 152 |
| locking Ford windows | 151 |
| Automobiles—Driving—natural gas for starting | 142 |
| Automobiles—Repairs—lamp for locating short circuits | 141 |
| Baby Chair—non-tipping | 141 |
| Bicycle—with auto steering wheel | 156 |
| Clock—how to level | 156 |
| Clothes Hanger—moth-proof | 151 |
| Clothesline—detachable reel | 148 |
| Door—silencer for sick room | 151 |
| Kitchen—filing cabinet aid in | 152 |
| Latches—for outside cellar doors | 150 |
| Lath—spraying speeds work | 155 |
| Mirror—campers' shaving | 152 |
| Paste—to squeeze from rubes | 140 |
| Photography—loading box aids field work | 153 |
| Rat Trap—simple way of deodorising | 141 |
| Ship Models—"Flying Cloud" | 143 |
| Skating—skate-sailing is thrilling sport | 137 |
| Sled—barrel stave | 151 |
| Snowslides—prevented by wire loops | 155 |
| Soap Bubbles—blowing giant | 142 |
| Valve Springs—uses for old | 155 |
| Wool-how to shrink darning | 141 |
| SHOP NOTES ||
| Aluminum |
| etching on | 175 |
| how to mend with zinc | 174 |
| Automobiles |
| double wheels conquer soft dirt | 158 |
| packing for Ford window glass | 163 |
| Automobiles—Repairs—restoring contact of third generator brush | 175 |
| Automobiles—Tires—vulcanizing inner tubes | 173 |
| Belting—softening hard leather | 176 |
| Coal—easily built portable bin | 175 |
| Commutator—tool for cleaning | 164 |
| Crankcases—machine for lapping | 162 |
| Crucible—improvised electric | 170 |
| Draftsmen |
| accurate perpendiculars with a 2-foot rule | 169 |
| a timesaver for | 159 |
| reading glass for | 163 |
| Drawings—protected from being soiled | 161 |
| Drilling—vertical holes without drill press | 163 |
| Dumb-Waiter—how to build | 171 |
| Eave Trough—combination hanger | 164 |
| Fertilizer—continuous for the garden | 161 |
| Furnace—easy way to fill water pan | 163 |
| Garage—Equipment and Supplies small crane | 173 |
| Gaskets—renovating copper asbestos | 173 |
| Handle—to operate two cocks | 162 |
| Hay—baled, dolly for handling | 169 |
| Iron—drilling chilled cast | 169 |
| Lathe—fitting, to do job requiring larger swing | 175 |
| Paints—effective tool for stirring | 160 |
| Pipe |
| unscrewing thin tubing | 174 |
| well, removing driven | 170 |
| Piston—ring compressor | 162 |
| Pliers—have stop for bending wire | 161 |
| Potato—better plants | 174 |
| Pump—old, making new | 165 |
| Sandpaper—using in plane | 161 |
| Saw Frame—farm, uses for | 160 |
| Saws and Sawing—case for the tool chest | 174 |
| Tank—hot-water, insulating | 157 |
| Vegetables—handy containers for store | 159 |
| Wire—coiled by aid of copper pipe | 172 |