XVIU 



INDEX TO VOLUME 



Page 



How the War Is Being Fought 193-209 



Why a Bullet Seldom Shoots Straight 244 



A Queer Adventure in War 247 



The New Aeroplane Gun 336 



How the War Is Being Fought 354-367 



Train and Tent Baths of the Russian Army 370 



Will Germany Live on Sewage? 380 



Recruiting Britain's Army with Motor-Trucks. 



Motion Pictures, Mirrors and Brass Bands . . . 387 



The Cost of the War 398 



Why Cotton Is Contraband of War 412 



A Barbed-Wire-Proof Fabric 485 



A Difficult Journey for An Army Tractor 490 



Decoy Targets for Zeppelins 512 



How the War Is Being Fought 514-527 



The Allies' Losses 540 



An Adjustable Crutch 558 



Effects of the War on German Industries 567 



My Adventures As a Spy 590 



INDUSTRIAL CHEMISTRY 



Bread Without Grain Flour 1 70 



Hard-Pressed Germany Invents New Foods 237 



Paper from Grass 248 



INVENTIONS TO MAKE LIFE EASY 



Burnishing with the Sewing-Machine 436 



Cigar Tip Protector of Many Uses 436 



Head-Guard for Alley-Boys 436 



VIore Accurate Calipers 436 



Trapping Mice in a Milk Bottle 436 



Tricking Fish with Electric Minnows 436 



Bicycle Frame Holds a Tire Pump 437 



Collapsible Millinery for Traveling 437 



A Cutter for Fiber Phonograph Needles 437 



Holding Meat While Carving 437 



A New Kind of Pin-Cushion 437 



Preventing Furniture from Chipping Walls 437 



Can Maidenly Modesty Ask for More? 438 



Conquering the Obstinate Oyster 438 



An Improved Potato Masher ■ ■. ''^^ 



One Motion of the Handles Works These Scissors' 



Blades Twice 438 



A Paper Milk-Bottle with a Window 438 



Salt and Pepper Shaker 438 



Light Your Umbrella if You Are Afraid to Go Home 



in the Dark 594 



Signaling to the Driver Behind You 594 



Pen Rack Removes Ink from Nib . 594 



A Freight Hook of Many Uses 594 



Do Not Wring Your Mop by Hand 594 



A Fountain Tooth Brush 594 



Adjusting a Shower Spray's Angle 595 



Both Direct and Indirect Lighting 595 



A Coffee Percolator in Your Cup 595 



Blow Up Your Shoes with Air 595 



A Vacuum Cleaner Dust-Pan 595 



A Spring Cover for Milk Bottles 595 



This Ice-Shaver Saves Muscle 596 



A Foot-Propelled Motor Skate 596 



A Tooth-Brush Which Fits Your Finger 596 



A Policeman's Club Which Is Also a Gun 596 



Chalking Billiard Cues Mechanically 596 



Parting Thick Tresses 596 



Adjustable Footrest 812 



A Buzz-Saw Safety Razor 850 



Fooling the Pickpocket 850 



Straw Hat Insurance 850 



A Tray to Hide Unsightly Cigar Ashes ■.■ ^^^ 



A Clean Way of Removing Pens from 1 heir 



Holders 857 



Learning Arithmetic with a Woman's Invention. . 869 



A Purse Powder-Holder 884 



Combined Eye-Shade and Program 905 



The Fruit Picker's Sleeve-Chute 914 



A Mitten-Duster 914 



Muffler for Bowling-Pins 914 



Packing the Things You Never Can Cram into 



Your Suitcase 914 



Safety-First for Window-Cleaners 914 



Small Electric Heater _ 914 



Down with the Portcullis, and Your Fis'i Is Caught 91 5 



Improved Pocket-Knife Punch 915 



A Magnifying Needle-Threader 913 



Mattress Handles Lighten Housework 913 



A Perfume-Wafting Fan 915 



Telephone-Mouthpiece Deadens OutsiJe Sounds. . 915 



Convenient Holder for Toilet Articles 691 



Page 



Cord Reel Is Telephone Convenience 916 



The Mechanical Fly Swatter 916 



An Umbrella with an Electric Fan 916 



A Sanitary Butter Dish 916 



Two Kitchen Forks in One 916 



MECHANICAL ENGINEERING 



A Machine that Chews Money 77 



Using the Sun's Heat to Heat Water 79 



Immense Watei Wheels Which Lift Their Own 



Water. 82 



A Windmill Which Always Turns in the Same 



Direction 167 



Steam-Driven Models Made by a Handless Me- 

 chanic 1 68 



This Belt Breaks All Records 1 76 



What a Little Engine Can Do 212 



A Machine to Pull Up Old Telegraph Poles 223 



Sprinkling Streets with the Aid of an Old Fort. . . . 228 

 The Sculptor's Use of a Pneumatic Chisel for 



Artistic Carving 229 



Testing a Hack Saw's Strength 258 



A Machine to Clean Blackboard Erasers 268 



Sharpening Drills by Air 336 



A Giant Grinder Which Goes to Its Work 338 



The Hobby-Horse Turned Into a Swing 340 



Lifting a Wagon to Dump Its Load 340 



Spending Money by Machinery 346 



Cleaning New York Streets with Modern Me- 

 chanical Appliances 378 



A Machine Which Climbs Poles 381 



For Squeamish Fowl-Killers 409 



Saving the Asphyxiated with a New Air-Pump. . 416 



A Movable Storehouse Elevator 418 



The Biggest Cast-iron Pipes in the World 487 



Saves Work of the Book-Gatherer 489 



Dumping a Whole Carload of Coal at a Time. . . 491 



Machine Fills Cracks in Pavements 491 



Suspension Bridges of Wire Fencing 495 



Midget Crane Has Giant Ability 507 



Riveting Without Rivets 509 



Giant Ladle for Molten Cinders 542 



A Magnetic Machine Which Saves Waste Iron , . 584 

 Climbing Steel Poles with the Aid of Special Shoes 644 

 Revolving Floor Puts a New Thrill Into the Dance 646 

 Doing Away with the Submarine's Storage Battery 654 



An Auger That Works'Anywhere 658 



Machine Shovels Faster Than Forty Men 661 



Three Tools in One 668 



A Machine Which Plugs Knot-Holes 730 



Lifting Made Easy 732 



Novel Box-Opening Knife 734 



Saw Guard with a Clean Record 738 



Pipe Bending — A Growing Industry 738 



Wagon-Loader Resembles Gold Dredge 741 



Eliminating Pottery Waste 742 



A Locomotive Apron Lifter 764 



An Automatic Pressure-Gage Alarm 781 



Avoiding Groundings in Running Metal Molding 



from Chandelier Outlets 785 



Giant Press Used in Making Shrapnel Shells 815 



Water Rises to Three Hundred Feet in New York 



Sky Scrapers 833 



How Record-Breaking Girders Were Handled . . . 863 

 A New Era in Water Power Begun at the Henry 



Ford Farms 864 



Niagara's New Air Route 858 



MODERN MEDICINE AND SURGERY 

 AND INDUSTRIAL HYGIENE 



The Electromagnet in War 27 



Why a Woman Can Outtalk a Man 53 



X-Ray Finds Safety Pin in Baby's Throat 54 



Hammering Spine to Cure Sick Heart. . . ; 55 



Mercury Poisoning and Deafness — the Price of a 



Derby Hat 68 



A Walking Leg Bath 73 



Hospital Work on the Firing Line 80 



Why There Are Defective Babies and Monsters . . 83 



An International Test for Vision ... 112 



Does Your Child Suck Its Thumb? 334 



Mending Bones with Rivets and Wires 337 



Sleep in Hot Water to Rest Your Nerves 381 



The Peril of the Fur Coat 383 



Babies in Glass Cases 390 



A Rowing Bath • 486 



Making a Throat Examination Behind a Glass 



Screen 497 



