INDEX TO VOLUME 91 



Page 

 Taking Photographs with a Concealed Camera. . . 327 



Airplane Camera Takes 750 Exposures 328 



A Motion-Picture Projector Which Can Be Carried 



in a Suitcase 423 



The Original Motion Picture Film 484 



Taking Pictures a Thousand Feet Under Water . . 577 



Moving Pictures That Really Talk 578 



Aim and Pull the Trigger to Photograph an Enemy 



from the Air 586 



Making It Easy to See the "Movies" 599 



Finger-Print Camera for Modern Sherlock Holmes. 678 

 Making Pictures and Projecting Them with the 



Same Machine 722 



Harnessing a Fighting Lion for the Films 739 



A Moving-Picture Show, the Martian Might See . 856 



A Motion-Picture Camera on One Leg 878 



How the Lion and the Lamb Lie DownTogether in 



the Motion Pictures 884 



Hang That Book from Your Shoulders 892 



Incandescent Lamps May Now Be Used to Project 



Motion Pictures 893 



PICTURE PAGES 



The Flag Equipment of an American Battleship. . 8-9 



An Airplane View of Salonika 10 



How New York Firemen Save Lives II 



Testing the Senses 12-13 



Primitive Man's Art and Handicraft 14 



Odd Specimens of Tattooing 15 



Selecting Fit Men for Our Navy 16-17 



The Latest Styles for Automobile Bodies 18 



Killing the Dry Frog in the Opera Singer's Throat 19 



Gas Masks Used in Peacetime 20-2 1 



Importance of the Hoe, Spade and Pitchfork in 



War 22-23 



Bayonet Practice for Our Recruits I 70 



Why the Hindenburg Line Seemed So I mpregnable I 7 1 



Sculpture of Fat and Sugar 1 72-1 73 



The Chimney Sweeps of Paris I 74 



Novel Methods of Recruiting 175 



The Importance of Rope on a Battleship 176-177 



Making the American Flag 1 78-1 79 



A Waterspout . . 180 



Keeping the Animals Cool in the Zoo 181 



Soldiers' Art Exhibit in Paris 182 



President Wilson's Message Reaches the Germans 183 

 Prisoners and Wounded Alike Must Have Pleasure 184 



Queer Trees and Near Trees — All Are Useful 185 



In the Grottoes Under the Battlefields 330 



Trench Farms of the Philippines 331 



The Eagle Builds Remote from Man 332 



Bungalows on a Roof 333 



And the Inventors Never Cracked a Smile 334 



France's Tank Contribution to the War 335 



They Earn Their Living with Their Senses. . .336-337 



Natural Figures in Wood 338 



Profit in Raising Skunks 339 



New Eagles of the Western Front 340 



Armor Appears on the Airplane 341 



Making an Army Hat 342-343 



Wood Carving by Machinery 344 



New Fashions in Gas Masks 345 



Army Refiigerating Devices 486 



Trained Horses for the New York Mounted Police 487 



Making Anti-Submarine Nets 488-489 



What It Means to Feed and Clothe the Armies of 



the Allies 490-491 



The Sahara Viewed from an Airplane 492 



Specimens of Indian Art 493 



Food — -Food Everywhere and Not a Bit to Eat . . . 494 



French Forces Using Liquid Fire 495 



Dolling Up Your Fo*d \ .496-497 



Big Guns Used by the Coast Artillery 498-499 



Various Stages in the Development of a Wasp . 500-502 



Posing on Flying Rings 648-9 



Queer Ways of Making a Living 650-1 



The Way of the Slacker Is Hard 652-3 



Baths Without Bath-tubs and Milk Without Dairies 654 



Cliff Dwellers Near Santa Fe 655 



Russia's Modern Joans of Arc 656 



A Sharp Shooter Wearing a New Water Jacket . . . 657 



Odd Uses of the Talking Machine 658-9 



Exploits of Tanks and Airplanes 660-1 



Who's Who and What's What in the Army 662-3 



Making Serums for Uncle Sam's Army 808-09 



X-Ray Photographs 810-1 1 



Page 



Women Working on French Dirigible 812-13 



Performing Dogs i 814 



The Allies Big Repair Tents 815 



Comfort Kits for Our Soldiers 816-17 



Avoiding a Broken Head in Boxing 818-19 



Fresh Air for New York's Anemic Children. . . . 820-21 

 Making Rifles and Bullets for Our Soldier Boys . .822-23 



PRACTICAL WORKERS' DEPARTMENT 



Cutting Clippings from Magazines with a Pin. ... 121 



Solid Board Fence with Artistic Upper Edge 121 



Rustic Furniture Made of Poles and Logs 121 



Using a Drop of Water for Lens in Photomi- 

 crography 123 



An Effective Fireproofing for Children's Clothing. 125 

 Collecting Ants in a Sponge and Drowning 1 hem . 125 

 Exterminating Moles and Gophers by Asphyxiation 1 25 

 Exhibiting Specimens of Flowers in Single Blos- 

 soms 1 26 



A Tracing Cloth Repair That Does Not Affect 



Transparency 1 26 



Differences in Curing Time of Parts Makes Poor 



Tire Repair 126 



Porcupine Removes Window Pane to Gain Admit- 

 tance 1 26 



Round Belt Guide on a Washing Machine Wheel. 127 



A Vine Covered Tepee for the Garden 127 



A Shaft-Polisher Made Like a Lemon Squeezer. . 127 

 Building an Artistic Bird-House for the Garden .... 1 28 

 A Printing Process for Imitating Hard Woods. ... 129 

 An Improvised Stage for a Country Fairy-Play. . 131 

 An Experiment in Optics Using Heated Graphite 132 

 Small Hand Drill Made from a Cheap Watch .... 132 



A Snap-Fastener for the Cupboard Door 132 



Awnings for the Veranda and How They Are Made 133 

 Fastening an Oar-Lock to Keep It from Falling Out 134 



A Boomerang Flyer 135 



How to Cut Roses So That the Plants Are Not 



Injured 136 



Sheet Metal Working Simply Explained 137 



A Pin Inverted in a Cork to Make an Oil Dropper 138 

 An Automatic Watering Tank for Poultry Yards. 138 

 A Trough for Thoroughly Washing Film Negatives 138 

 Safety Guard Placed on an Emery- Wheel Dresser 139 

 A Nest-Box Trap for Catching the English Sparrow 1 39 

 Look Over Stored Tires Before Applying Them to 



Rims 139 



An Easily Made Garage from a Metal Tank 140 



A Cheap and Effective Method of Bracing a Roof 140 

 Small Closet in Door Frame Stile for Milk Bottle. 140 



Winning an Athlete's Laurels 141 



Sticky fly Paper Used to Keep Insects Away from 



Poultry 145 



Saving Concrete in Setting Posts in Holes 145 



Waterproofing Blue Prints and Drawings for Rough 



Handling 1 45 



A Coating Which Gives the Appearance of Stone to 



Wood 146 



A Special Ladder for Use in Boiler Shops. 146 



Three Plates and Three Color Screens Used in New 



Color Photography I 46 



Making a Push Cart Oil Sprinkler for Dusty Drives 28 I 

 Never-Slip Calks Used on Lawn-Mower Wheels. . 281 



Three Methods for Finding a Chosen Card 281 



End Mills Made of Broken and Worn Twisted Drills 282 

 Fastening Nails So They May Be Quickly With- 

 drawn 282 



Waterproofing for Concrete Walls and Floors 282 



An Open Shelter for the Yard or Flat Roof 290 



A Self-Acting Fountain for the Home Conservatory 291 

 Preserving Unpainted Surfaces Caused by Wear . . 293 

 A Substitute for a Shoe Horn in an Emergency . . . 293 



A Tool for Accurately Lining Shop Shafting 294 



A Turned Down or Pistol Grip Handle for a Rake . 294 

 A Cement Wash for Applying to a Damp Wall . . . 296 

 A Porch Swing Made from Your Favorite Rocker . 296 



Sheet Metal Working Simply Explained 301 



Folding Camp Fireplace Made of Angle Iron. .... 302 



Garden Seat with Checkerboard in Its Top 302 



Making an Electric Searchlight for a Motor-Boat. 307 



Running Bell- Wires Through Walls 442 



A Binder for Water Colors 446 



Window Tappers Which Tap Intermittently 454 



Bath Water Supply for an Army Camp. 456 



The Right Meaning of the Term Reaming 456 



Sending Small Coin by Mail 456 



