Popular Mechanics/Volume 49/Issue 1/Contents

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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

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ISSUED MONTHLYSUBSCRIPTION:SINGLE COPY, 25 CENTS

In United States and its possessions, also Canada, Cuba, and Mexico, per year, postpaid	$2.50
To all other countries in the Postal Union	3.00
All subscriptions are discontinued at expiration. Please examine the date printed on your wrapper.
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

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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