Page:Popular Science Monthly Volume 88.djvu/25

 INDEX TO VOLUME 88

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A Tuning-Coil Slider 468

Reconstructing a Dry Battery 469

Mounting Spark-Gaps to Elliminate Unnecessary

Noise 471

Winding Tuning-Coils 47 I

What Radio Readers Want to Know 472

Money Prizes tor Radio Articles 481

An Undamped Wave Receiver 613

The Tuning of Radio Telegraph Receivers 619

How to Build the Mast for a Wireless 623

What Radio Readers Want to Know 627

How to Fit Cables Into Small Terminal Holes. . . . 762

Damping in Radio Circuits 775

A National Wireless Association 779

Lamp Resistance for Charging Storage Batteries. . 781

An Unusual Recording Receiver 782

Tubular Quenched Gap 782

Telephone Receivers 783

Learning the Code 783

Magnetic Adjustment of Audion 783

An Electromagnetic Rectifier and a Polarized Relay 784

Inexpensive Stranded Aerial Wire 785

Automatic Dead-End Switch 785

Audion of Increased Sensitiveness 787

Repairing a Burnt-Out Fuse 788

Constructing a Variable Condenser 787

What Radio Readers Want to Know 790

Sharpness of Tuning in Radio 935

Antenna Wire Strength 940

Preventing the Audion from Choking 943

Unit Type of Plate Gap 943

The Non-Synchronous Rotary Gap 944

Quenched Gap Damping 944

A Wireless Log for the Amateur 944

Japanese Wireless Telephone 947

Radio Tower at Tufts College 949

What Radio Readers Want to Know 950

RAILWAYS

Locomotives Serve as Fire Engines 8

Artificial Rainstorm Tests Car Roofs 10

Sidewalk Shelters for the Trolley Patrons of

Cincinnati 10

Telephoning from a Moving Train 11

A Boy's Wonderful Working Locomotive Model. . 25

The Steam Engine in War 74

Motor Car Mows Railroad Weeds 79

Publishing a Paper Aboard a Train 185

To Keep Automobiles Off Railroad Tracks 224

The Size of a Railway Station 233

New York Trains That Play Leap Frog 245

Process for Painting Cars Rapidly 261

Catching Eggs from Swiftly-Moving Trains 343

Railroad Gate Warns and Stops Reckless Motorists 373

Baking a Railroad Car to Dry the Paint 423

Tamping Railroad Ballast with a New Air-Tool. . 536

Stopping the Speeder with a New Danger Sign. . 541

Not a Toy — A Real Locomotive 490

Asleep on the Sleepers 688

How Fast Is Your Train Moving? 693

Burning Cars to Make Money 714

How a Second-Hand Automobile Made a Railroad

Pay. ... 732

A Fire-Fighting Trolley Car 735

A Scientifically Designed Train-Announcing Mega- phone 741

A Continuous Railway Crossing 745

A Successful Railroad 828

Expensive Transportation 890

A Traveling Laboratory for Testing Railway Scales 890

RECREATION

Curved Spring Device Returns Bowling Balls. ... 813

Ice Skating in Summer Without Ice 908

Answers to Sam Loyd's April and May Puz- zles 912 913

Kite Making at Home 92 I

A Camper's Dutch Oven 934

ROAD BUILDING

A Three Million Dollar Automobile Scenic Highway 56

Perils of the Bad Road 226

An Automobile Road Sign and a Map Combined. . 229

Applying Hot Road Material 267

Blasting for Good Roads 750

Bad Roads Make Bad Going 829

"Once Over" and the Road Is Done 876

��SHIPS AND SHIPPING Page

New Diver's Suit Does Away with the Hand Pump 29 Gangway Life-Saver Prevents Crushing of Life

Boats 58

Gliding Boat for Tropical River Mail Service ... 74 Saving Men from Scalding Steam in Steamship

Engine Rooms 254

Detecting Fires in the Holds of Trans-Atlantic

Liners 257

Steamer Breaks Back in Storm 335

A Submarine That Dived but Once 391

The Unabashed Fish and the Noisy Motor Boat. . 393

A Dreadnought's Buoy 404

Floating a Sunken Warship on a Bubble of Air. . . 405

Taming Those Harbor Pirates 498

A Calking Compound 505

Italians Build Highest Powered Motor Ship 541

Breaking Storm Billows with Compressed Air ... 561

The Undependable Fog-Horn 575

Miniature Ships That Were Built to Prove a Point 580

Reverses Tug's Propeller Blades 663

Exit the Mississippi Stern- Wheeler: Enter the

Motor Barge 696

Making a Life-Saver of a Leak _ 700

Using Triggers to Launch Uncle Sam's Battle-ships 703 Making Your Own Boat Repairs Under Water. . 711

Submarine Signaling with Sound Waves 712

Ancient Battleship Ideas Revived 737

A New Way of Loading Steamers from Freight Cars 829

SOUND RECORDING AND TRANSMISSION

Edison's Phonograph Diaphragm to Record Only

Faint Sounds 10

Selling by Show- Window Telephone 18

A New Device for Recording Sounds 58

Hearing the Stones on a River's Bed 92

WAR PROBLEMS IN AMERICA

Forts that Travel on Rails 323

A Torpedo with Eyes 424

Our Helpless Coast Defenses 499

Helpless United States 689

Undersea Fighting of the Future 803

THE WAR AND ITS EFFECTS

How War Mobilizes the Non-Combatant 812

London War Affects Baby Carriages 812

The Gentlest Bullet 819

Marvelous War Map 828

War and Trade 833

How the War Is Being Fought 834 849

WHAT'S NEW IN PATENTS

Erasing Attachment for Typewriters 105

Soda Fountain in a Suitcase. . 105

A Finger-Knife for Egyptian Corn 105

Foiling the Safe Blower ' I '

Baby's Bottle Holder I 58

Tool for Stripping Insulation I 58

Electrically Lighted Pencil 1 58

Combined Door Bel! and Mail Receiver 1 58

An Aid to the Veterinary 1 58

A Room Stove Water Heater 1 58

Sanitary Kneading Board '59

Self-Feeding Soldering Iron '59

A Pad and Pencil Holder for the Telephone 159

Folding Tooth Brush I 59

Apparatus for Cleaning Hair Brushes I 59

Combination Sad-iron Heather and Cooking

Utensil '59

Shoe Polishing Device •(>0

Opening and Closing Garbage Cans with the Foot. 160

Purse in Palm of Glove 160

Anti-Skidding Chain 160

Walking Stick Becomes a Seat 160

Meal-Holder Which Makes Slicing Easy 160

New Headlight Dimmer 272

Keeping Your Sole Warm 272

Adjusting a Brush to Its Handle 272

For Applying Chains to Wheels 272

Combined Egg-Tester and Mailing Tube 272

Clothes Rack Dryer 272

Combined Coat Hanger and Trousers Stretcher. . . 273

Making It F.asy for the Birds 273

A Simple Signal for Automobiles 273

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