Popular Science Monthly 



INDEX 



\\)lumc 89 — July-December, 1916 



AERONAUTICS Page 



Yachting in the Air 22 



Aeroplane Dreadnought!) 75 



Torpedoing a Submarine from an Aeroplane 323 



The Wastage of Flying Machines in the Great War 377 



War Progress in Flying 523 



Testing the Air-Fighter's Nerve 580 



Testing the Liftin|; Capacity of Balloon Fabric. . . 586 



Introducing Our First Anti-Aircraft Gun 657 



The One-Man Aeroplane Which a German Boy Is 



Building 695 



The Sentinels of the Sky Above the War Zone 



Trenches 839 



Making the Aeroplane Generate Its Own Power 



for Wireless 842 



Faster Than the Fastest Express Train 865 



AGRICULTURAL SCIENCE 



An Instrument for Plucking Flowers 19 



A Workshop on Every Farm 55 



A Flower Bed on top of a Rock 56 



A Unique Garden-Hose Holder 56 



Conelike Flower-Holder in a Brick Wall 63 



Filling Trenches by Machine 94 



The Milk-Can Trolley 100 



Chickens Feed Themselves on the Run 110 



Measuring Rainfall on the Farm 160 



Uncle Sam Says Miraculous Wheats Are An Old 



Delusion 166 



Threshing by Night Under Electric Light 166 



Whv the Gasoline Engine Keeps the Farmer Boy at 



Home 175 



Hitching the Mower to the Farm Automobile ... 182 

 Accelerating the Fruit- Picker with a Picking 



Harness 185 



A New Garden Duster Which Uses Dry Spray . . 195 



Plants on National Forest Ranges Which Kill Cattle 252 



A Giant Cypress Tree Village in Paris 267 



A Painless Way of Killing Chickens 294 



A Simple Home-Made Milking Stool 299 



Chick Mash Box 301 



I mproving the Hog's Table Manners 306 



Uses for Wire-Glass on the Farm . 308 



Raising Parasites to Fight Pests 368 



The Floating Vegetable Gardens of Mexico 384 



A Garden Tractor which Does Everything but 



Mind the Baby 410 



Rolling. Harrowing and Seeding with One Machine. 41 7 

 A Weed Destroyer from a Spoon and Broom- 

 Handle 468 



A Portable Colony Poultry House 476 



A Cozy Southern Farmhouse 479 



An Easily Made Self-Locking Device for Barn- 



Doors 614 



A Combined Farm Implement Shed and Machinc- 



Shop 640 



The Largest Duck Farm in the World 662-3 



The Handiest Bam Ever Built 675 



A Humane Method of Destroying Horses 684 



Cleaning and Sorting Beans by Machinery 686 



Teaching English Girls the Art of Milking 738 



Branding Animals with a Clamp-Button Monogram 747 



An Alarm-Clock Dinner Bell for Old Dobbin 779 



An Automatic Grain-Valve to Prevent Waste . . , . 780 



Tropical "Snow Drifts" of Cheesecloth 819 



An Adjustable Steering Device for the Tractor . . . 832 



Sheep May Not Like This But It Saves Time. . . . 855 



Separutine the Rooster from His Crow 868 



Warning Herdsmen of Storms 893 



Are You Paying for Your Farm or Is It Paying for 



Itsclf> 893 



Indoor Tomato Plants Fifteen Feet High 895 



Valuable Products from Cherry Pits 895 



An Anchored Hen House 912 



Plans of a Small Modern Dairy Barn 960 



ASTRONOMY Page 



Curious Set of Features Are New Markings on Mars 225 



Lost Comets 504 



Is Jupiter Launching a Moon? 678 



Studying the Stars with Mirrors 908 



AUTOMOBILES AND ACCESSORIES 



Automobile Scale-Demonstrator 6 



A Duck-Boat as an Automobile Top 14 



Portable Electric Tire-I nflator 26 



Keeping Things Cold in a Real Automobile Refrig- 

 erator 27 



A Record Motor-Truck Load of Barrels 27 



How One Ford Got Up in the World 28 



How Automobiles Innocently Break Windows. ... 31 

 How an Automobile Engine Tests Water-Mains . . 48 



What Make of Car Is It? 72 



The Possibilities of the Ford Chassis 84-85 



Semaphore Signals for Automobiles 114 



Using Gates to Lessen Danger from Truck-Trailers I 16 

 Lapping a Scored Automobile Engine Cylinder. . . 124 



A Handy Hook for the Automobilist 125 



Trend of Motor-Truck Design Toward Worm Drive I 59 

 An Air-Propelled Automobile for Three Dollars. . . 173 

 The Reinforced Concrete Principle Applied to 



Automobile Tires 182 



Automobiles. Motor Trucks and Accessories - 186-189 

 Moving Guns with an Electric Battery Crane-Truck 23 I 

 Automatic Flagmen to Warn Motor-Car Drivers. . 242 



A Gasoline-Electric Automobile 253 



Lubricating Your Automobile 262 



Starting Your Automobile with Ether 307 



This Automobile Seat Serves as a Waiting Room. . 332 



Economizing Gasoline for Automobiles 355 



A Shim for Adjusting Plain Bearings 355 



Automobiles. Motor-Trucks and Accessories. . .356-357 



Fifteen Motor-Trucks in One 358 



When the Horse Tops It Over the Automobile. . . 360 



Railroad Treads for Motor-Trucks 391 



Motor-Trucks to the Rescue in a Freight Embargo . 412 



An Electric Motor-Chair 412 



A Six- Wheel Automobile 430 



Wiring the Ford for Magneto and Battery 442 



Pumping Gasoline to the Motor 508 



The Motorcycle Machine-Gun 529 



Automobiles, Motor-Trucks and Accessories. . .540-543 



"Troubleshooting^' at Night 544 



A Motor-Truck That Equals Two 545 



The Wiles of the Automobile Thief 560 



A New Gasoline-Motor-Driven Road Roller 561 



Motoring on Roller-Skates 569 



A Six-Mile Trip Through a Sewer on a Motor-Cycle 574 

 The Sidewalk Coaster Becomes an Automobile. . . 592 



Making Automobile Wheels Track Correctly 593 



Quickly Adjustable Automobile Fan-Belt Fasteners 604 

 Loading Small Luggage on the Outside of the Car 605 

 How Piston-Ring Defects Have Been Overcome. . 605 



Lightening Automobiles with Aluminum 606 



Operating the Oil-Pump of an Automobile by Valve 



Action 615 



A Watch-Carrier for the Motorcycle Handlebar . . 615 



Easily Attached Shock-Absorber 618 



How to Avoid Ejtcessivc Oiling in Cylinders .... 620 



Spark-plugs Tested Without Removal 62 t 



A Washstand Light for Garages 645 



Charging Weak Magnetos of Weak Automobiles. . . 672 



A New Brake Which Makes Trucks Safe 685 



Rubber-Ball Fender to Protect Unwary Pedestrians 685 

 Recording the Vibrations of a Motor-Truck Spring 688 

 When You Leave the Automobile. Lock the Robes! 699 

 Automobiles, Motor-Trucks and Accessories . .700- 703 



The Automobile Street Car 724 



Breaking a Mountain Trail 740 



A Motor-Wheel for the Railroad Velocipede 742 



Automatic Word Signals for Automobiles 746 



