INDEX TO VOLUME 91
��Page One Inventor's Idea for Lengthening the Life of a
Rubber Tire • 255
Making a Trolley-Car of the Motor-Truck 261
Device to Remove Automobile Bodies Without
Scratching 262
The Newest Child's "Pushmobile" 263
An Easily Adjusted Tire That Locks Itself on the
Wheel 268
A Motor-Truck for Ice Cream Delivery 272
Tipping Truck for a Large Cylindrical Oil Tank. . 282
Miniature Automobiles and Their Race Meets. . . . 283
Effects of Oil and Grease on Rubber Tires 288
Repairing a Worn Plunger in an Automobile Oil- Pump 293
A Tractor Trailer Made for an Old Automobile. . 295 Inflation and Weight Governs the Resiliency of
Tires ....296
Constituency of Rubber for Side Walls of a Tire. . 302
Salvaging Motor Wrecks with an Equipment Car 324
Motor Truck Carries Thirty-Eight Soldiers 326
Live Steam or Vapor to Save Gasoline 351
A Lock which Makes the Ford Car Thief-Proof. . . 353
Automobile Accessories 357
Men Whom the Automobile Has Made Rich . .358-359
The Gasoline Automobile as a Locomotive 360
The Air-Propelled Unicycle 370
Loading Coal Baskets from a Motor Truck 379
Cleaning the Air Fed to Automobile Cylinders. . 383
The Biggest Automobile Spring 384
What Six Gallons of Gasoline Can Do 409
A Dust-Proof Cover to Keep the Automobile Lug- gage Clean 417
A Tire Pressure Gage No Bigger Than a Pencil. . 421
Storing Automobile Fenders 424
A Garage Built with the Contour of a Cathedral. . 431
An Anti-Kick Device for the Ford 435
Caring of Inner Tubes to Prevent Chafing 455
Dust Proofing the Automobile Priming Cup 455
Rim Cuts in Tires 470
Automobiles, Motor-Trucks and Accessories . . .508-51 1
Turning a Car in Its Own Length 512
This Truck Loader Will Lift One Ton Ten Inches
Per Second 517
Your Motor Is Known by the Piston Rings It Has 522 The Small Caterpillar Tractor Rings the Death
Knell of the Industrial Railroad 532
The Rising Price of Automobiles 543
Inspecting a Six-Mile Tunnel by Automobile 544
A Motor Truck Line I 540 Miles Long 548
Advertising by Motor-Truck 549
Photographing the Jolts of an Automobile 550
Loading Trucks Without Disturbing Sidewalk
Traffic 554
A Car-Lifting Brake 560
Improved Electric Gearshift for Autos 567
Buying a "Used Car" 573
This Tire Pump Gets Power from the Engine
Crankshaft 585
A Harrow-Like Brake for Mountain-Climbing
Automobiles 590
The Common Rotary-Valve Gasoline Engine Is a
New Departure 600
Testing for Trouble That Causes Poor Auto Lights 610
How to Relieve Your Auto Brakes 617
Electrically Operated Turntables for Automobiles . 669 Automobiles, Motor-Trucks and Accessories .... 674-7
It Has Both a -Pneumatic and a Solid Tire 681
Preventing the Ford Engine from Overheating. . . . 687
Touring in a Motor-Truck 697
Transporting a Precious Mirror 703
An Automobile Safety Device 705
Kerosene-Driven Farm Tractor 720
Hauling a Seven-Ton Truck Out of the Mud 735
Changing a Roadster Into a Five-Passenger Car. . 737
Getting More Mileage Out of Gasoline 738
A Simple Cylinder Re-Boring Machine 748
A New Way of Cushioning the Front Spring Action
of an Automobile 828
Three-Purpose Electric Drill 828
The Automobile Driver Must Know What to Do in
. Case of Accident 83 1
Bell Gives Warning When Automobile Backs Up. . 834
A Powerful Motor Sprinkler 849
New Motor Truck Kitchen 85 I
Automobile Accessories 852-53
Mirrors to Avoid Auto Accidents 855
Burning Distillate in Your Auto Engine 864
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Keeping Auto Engine at Right Temperature 866
Turning the Headlights Electromagnetically 919
Forty-Five Miles an Hour on This Motorcycle Sleigh 920 An Automobile Steering Wheel for a Bob-Sled. . . 928
NATURAL SCIENCE
The Grave-Digger Beetle 25
How Scientists Capture Mosquitoes Alive for Ex- periment and Study 26
Japanese Mosquitoes for Bird Food 68
Counting the Drops in a Fog 91
Mountains Float 1 08
The Common Housefly Is the Most Unpopular of
Insects 110
The Misunderstood Shark 196
Teaching the Proper Care of Forests by Object
Lessons 1 99
It Is Beautiful Because It Is So Ugly. 201
Teaching Children Natural History with Animal
Pictures Made of Sand 201
Mysterious Ice Mines 207
Poison Ivy and How to Avoid It 207
The Curious Ways of Egypt's Holy Beetle 252
What Monterey Did with a Whale 255
Everybody Knows the Squash Bug 264
Coaxing Music from a Pile of Rocks 267
Imitating Nature with a Miniature Volcano 286
An Irish Thrush Rings for His Food 288
Potash from California Sea Kelp 325
Operating upon Trees 346
Unwashed Sponges Are Dirty 351
Penitentiary Roof Garden 390
Feeding London's Zoo Animals 400
The Night Song of the Tree Cricket 406
Faces in Walnut 407
Why Pheasants Need Foster Mothers 410
Growing Umbrella Handles ,. 420
How a Cyclone Bent a Flagpole 433
Why Does a Cat Have a Tail? 438
This Bird's Nest Is a Two-Room Apartment 525
If You Had No More Teeth Than an Elephant You
Couldn't Be a Soldier 572
Teaching the Truth About the Misunderstood
Snake 579
Rivers That Flow in Two Different Directions .... 678
Why Do Salmon Go Annually Out to Sea? 681
A Thirty-Five Acre Island of Mud Near Memphis 721
The Robber Crab 730
Orchids That Grow on Telegraph Wires 731
How Plants Accommodate Themselves to the Cli- mate f 737
San Salvador's Terrible Quake 741
A Lizard That Squirts Blood from Its Eyes 805
Palm Spiings 805
Snow Honeycombs and "Penitents" 805
How Did One Egg Get Inside of the Other? 826
The Cut Branch Did Not Die 836
Exploded Beliefs about the Arctic 839
You Can Hold a Dozen of These Coconuts in One
Hand. . 848
The Eccentricities of the Sleeping Horse 851
Can a Frozen Fish Be Restored 873
Mvsterious Sound That Baffles Science 881
Eat Your Dates with an Easy Mind 918
PHOTOGRAPHY AND MOTION-PICTURES
A Photographic Trick— Try It the Night of the
Fourth 7
Making "Night Scenes" for the Motion Picture. . . 24
Wireless in the Talking Movies 33
Making Motion Pictures at Home. 54
Taking Motion Pictures on the Road in a Queer
Vehicle 61
An Attachment Which Will Lock Your Camera to
the Tripod in an Instant 120
Dinner Served in Gondolas on a Champagne River 220
Camera Handled Like a Pistol 241
Directing a Motion Picture Show from the Mana- ger's Office 254
Taking Snap Shot Action Pictures at Night 280
A Solution for Reclaiming Over Exposed Blue
Prints 287
Leveling a Motion Picture Camera Tripod 292
A Quick Action Electric Switch for Photographers 307
Taking the Glare Out of Motion Pictures 324
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