Page 



The Wreck of the Sumner 497 



The Terror of the Sea . 546 



Trolley Cars on Water 560 



The Acetylene Life Buoy. It Blows Itself Up .... 583 



Torpedo-Boat Destroyers 693 



A Non-Sinkable Lifeboat 696 



Hiding a Ship in Smoke 704 



Fighting Crafts Cost a Fortune to Build 725 



What's a Dreadnought? And Its Purpose? 729 



The Battle Cruiser of the Future 730 



The Torpedo Boat Destroyer 826 



Six Acres of Coal Floating on the Mississippi. . . . 836 



A Giant Life-Raft 850 



Wooden Ships of 3.000 Tons 860 



A Sunken Ship That Earned a Fortune 884 



Freighting a Steamer by the Marine Elevator .... 908 



Locating a Sunken Ship 920 



SPORTS AND PASTIMES 



Prince, the Only Ice-Skating Bear 4i 



Riding a Bicycle on Your Stomach 41 



Salmon Fishing in the Columbia 99 



A Coasting Bob 139 



An Electric Alarm Signal for the Fisherman 1 49 



The "Why" of a Golf Ball's Flight ■ 186 



Is This the Secret of Ventriloquy? 209 



Bicycling for the Blind 217 



Making Designs with a Magnet 217 



Playing Checkers with Electric Lights 246 



Interesting Winter Games 295 



A Trip to Sugar Loaf Mountain 334 



The Latest Rival of the "Punch and Judy" Show. 348 

 A "Preparedness" Sleeping Outfit for the Camp . . 361 



A Machine for Teaching Golf 371 



A Broncho for the Surf 389 



The Stars and Stripes Forever! .' 390 



Muskrat Hunting 394 



A Butting Match Between Mechanical Pugilists. . 432 

 A Doll Which Is Abused for the Sake of Exercise . . . 432 



The Game of the Pot of Gold 457 



A Golf Ball's Washing Machine 406 



Fighting the Terrible Devil Fish 483 



The Book Theater 487 



Sun Glasses for the Baseball Muffer 487 



A New Press for the Tennis Racket 512 



Freaks of Nature — And How to Make Them 516 



A See-Saw Swing 557 



Shoot Your Deer from Horseback 567 



Sliding Down a Mountain on a Summer Sled 584 



Training Harvard's Crew on an Artificial River 598 

 New Clay Pigeons That Break with a Single Shot . 602 



A Cover and Press for the Tennis Racket 684 



Flying Kites for Prizes 743 



New York City's Indoor Golf Course 747 



Playing Baseball with Rifles 751 



A Practical Shotgun Sight for the Trap-Shooter . . 753 



Coaxing Birds to Your Garden 756 



Winning an Athlete's Laurels 781 



A Clever Fishing Device 828 



A Vanity Case for the Bather 856 



An Aid to the One-Eyed Shooter 865 



A Bicycle Mounted on Rollers 866 



Catching Minnows for Bait in a Basket-Net 883 



How to Take a Drink and Eat Wiiile Fishing 888 



Decorating Pottery with Sealing Wax 889 



Toy Clowns That Perform Acrobatic Feats 889 



At What Age Does the Athlete Begin to Lose 



Form? 896 



Ball Throwing with a Sling 902 



Winning an Athlete's Laurels 941 



WAR PROBLEMS 



The Superdreadnought Pennsylvania 17 



Protecting a Battleship Against Torpedoes 81 



What the First Aerial Bombs Were Made of 165 



Firing a Big Artillery Gun 212 



Rubber Instead of Glass Eyes for Wounded Soldiers 244 

 How French Air Fighters Handle Bombs and 



Machine Guns 256 



The Biggest Battle Cruiser 268 



Discovering the Spy's Secrets by Means of a 



Lemonade Bath 349 



Evaporated Foods, an Outcome of the War 373 



The Greatest Game in the World 407 



Why Zeppelins Are Frightful ; 518 



The Torpedo Car — A Super-Trench Destroyer .... 526 



Page 



If Helmets Are Good, Why Not Armor? 530 



A Non-Recoil Gun 532 



Defending Our Coast 543 



Playing at Battle 544 



The Terror of the Sea 546 



New York State Protects Her Strategic Points. 553-554 



Teaching Our Soldiers How to Fight 561 



The Convertible Knapsack 568 



Turning Out Helmets for the French 569 



Why Navies Have Small Armored Cruisers 577 



War Time Uses of Wood 590 



Foiling Torpedoes with Whirling Plates 643 



A Honk! Honk! in the Trenches Means "Don Your 



Gas Masks!" 664 



The Story of the Machine Gun 666 



A Toy Field Hospital for an Object Lesson 673 



Army Cooks Prefer Kerosene to Wood for Fuel. . 679 



How Aviators Land Safely at Night 680 



"Bullet-Proof Rooms. Two Dollars Per Day" 683 



Submarine Mines 689 



Torpedoing from an Airplane 690 



Torpedo-Boat Destroyers 693 



The Single-Man Tank 702 



Hiding a Ship in Smoke 704 



The I nside of a Tank 712 



Fighting Crafts Cost a Fortune to Build 725 



The Battle Cruiser of the Future 730 



Combining the Periscope with the Military Rifle. . 740 



Getting Rid of Vermin in the Trenches 742 



Wireless in the Trenches 795 



Laying Telegraph Cables Under Fire 803 



An Observation-Tower Car for the Army 837 



Making Your Watch Tell the Truth 849 



An Upside-Down Watch '. 856 



"Going to Sea" in an Armory 857 



A Modern Armor 858 



Ten Thousand Medical Officers Are Needed for a 



Million-Man Army 886 



Stopping Mexican Bullets with Sand-Filled Cans 891 



A Novel Bicycle Ejierciser for the Wounded 896 



The War Costs Great Britain the Cost of a Panama 



Canal Every Thirteen Days 897 



What the Zeppelins Have Cost London in Acci- 

 dents and Deaths 912 



The Favorite Weapon of Assault 917 



MISCELLANY 



A Sheltered Feeding for the Birds 28 



Man Becomes a Beast in Hand-to-Hand Conflict. 30 

 Giving a Personal Touch to Circulars and Form 



Letters 31 



Putting the Bicycle to Work 31 



A Periscope Attached to Field-Glasses 32 



An Obliging Cigar-Lighter Which Feeds Lighted 



Matches 32 



How I Judge Men 33 



A Practical Fuel-Oil Burner 40 



A Pneumatic E,xterminator 44 



A Bullet-Riddled Dispatch-Rider's Car 46 



A Giant Hobby-Horse 47 



Preventing Cats and Squirrels from Climbing Trees 49 



Reforming Bad Boys with Egg-Shells 49 



A Brush for the Phonograph Needle 54 



How They Wash Clothes with Wind 60 



Rope Riches of the Philippines 61 



Combination Christmas Tree-Holder, Telephone 



Stand, and Tabouret 64 



An Eight-Hour Clock for the Eight-Hour Day.. 65 



Adjustable Stilts 68 



A Wrestling Dummy 68 



A Bungalow Fire Station 70 



A Carload Featherbed of Scrap Tin 70 



Getting the Most Out of Mining Mules 70 



Safeguarding the Nation's Money 76 



Cooling Off a River with Its Own Water 80 



Felling a Stack of Steel by Means of a Flame .... 80 

 A Steam Tractor Makes a Theater Audience 



Conifortable 83 



A Device for Extracting Rusty Pen-Points 95 



A Box-Testing Machine 95 



Is That Ten Dollar Bill Good or Bad? 97 



Providing Your Pen with an Ink Well 98 



Freakish Accidents 100 



A Friend of the Traveling Shoe Salesman Must 



Have Invented This .- ■ • • ' ' ^ 



The Problem of the Sloping Shoulder Solved with a 



Plumb-Line 113 



