Popular Science Monthly 

 INDEX 



Volume 91 — July-December, 1917 



AERONAUTICS Page 



Ancestors of the Bird and Airplane 3 



The Strength of Human Wings 32 



Fighting from Balloons 50 



Fighting in the Air 76 



America's Biggest Flying Machine 200 



U. S. Dirigible D.N. I 225 



"Pillows" as Airplane Targets 327 



A Fire-Chief's Airplane 385 



The Ideal Aerial Bomb 386 



Will the Dinners of the First Trans-Oceanic Flight 



Be Hot? 425 



A Life-Preserver for Aeronauts 439 



The Charge of the Lightest Brigade 530 



The Airplane to the Rescue of Storm-Tossed 



Mariners 538 



The Zeppelins Are Coming! Hug the Ground. . . 540 



Protecting the Airplane with a Fire-Proof Coating 542 



Air Scouts Learn to Sketch Battlefields 545 



The New Blimp Type of Dirigible 546 



Italy's Huge Bombing Triplane 688 



Catapulting Seaplanes from U-Boats 696 



Directing the Big Gun Fire from Airplanes 701 



New Gun-Tunnel Airplane 709 



Testing the Fighting Aviator. 711 



A New Map-Holder for the Aviator 728 



Sixty Miles an Hour Is the Climbing Speed of Fly- 

 ing-Machines 744 



Making a Safe Landing at Night from an Air- 

 plane 752 



Fishing in the Air 803 



A Biplane Which Crashed Through a Roof 838 



Sixteen Airplanes Against One Destroyer 850 



The Sun, an Enemy to Airplanes 857 



Testing Airplane Engines at Factory 861 



Dummy Airplane Targets 866 



Commuting by Airplane 879 



Our Aviation Problems 894 



Aviators Now Can Carry Their Telephones Under 



Their Hats. 907 



Testing Airplanes in a Man-Made Storm 910 



AGRICULTURAL SCIENCE 



Guinea Pigs Were Once Cultivated Like Chickens 



for Food > 27 



Making the Cow's Tail Behave with a Trolley 



Restrainer 27 



A New Corn-Husking Machine 60 



A Garden in Which Weeds Are Not Only Tolerated 



but Cultivated 61 



To Make Your Lawn Attractive You Must Edge It 



Evenly 89 



An Adjustable Rake for the "Land Patriots" .... 90 



Silo Roof Opens Like Umbrella. 106 



Take Good Care of the Eggs This Year 167 



Growing Mustard and Water Cress on Blankets. . 204 



Plowing and Pulverizing the Soil in One Operation 205 



Soya Beans, a Substitute for Meat 206 



Studying the Effects of Calf-Foods by Means of 



Photographic Records 253 



The "Pretty Maids" of a Chinese Window Garden 269 



The Stationary Fruit Net 273 



To Prevent a Colt from Becoming Tangled in 



Halter Rope 288 



An Old Cake Tin Makes a Good Watering Pan for 



the Poultry Yard 300 



A Plumbing System for the Farm Residence 305 



Watering Plants Drop by Drop 354 



Subduing the Cow's Tail 388 



The Latest Tree-Trimming Ladder 407 



A Tin-Pan Orchestra to Scare the Birds Away 430 



A Stylish New Coat for the Baby Lamb 507 



Page 

 The By-Products of the Grapefruit Obtained from 



the Culls 555 



A Little Bit of Egypt on a California Ostrich Farm 570 



Let the Birds Save a Billion Dollars a Year 588 



Sowing Tree Seed in the Snow 588 



Gold-Plated Teeth for the Sheep Is Common in 



Scotland 591 



Keep Livestock Away from Railroad Tracks .... 644 

 A Spading Machine Which Makes Patriotic Gar- 

 dening Worth While 685 



A Pig Carries His Own Pen 698 



A Portable Alfalfa Mill 698 



A Homemade Plow 706 



Providing a Treat for the Birds in' Cold Weather. . 728 



Grooming the Horse with a Vacuum- Cleaner Mitten 746 



This Is the Way They Plow in Porto Rico. . . .... 750 



Hatching Chickens in Glass Globe by Electricity . 806 

 The War Gardens of Railroad Employees and Sta- 

 tion Agents 893 



His Majesty, the Turkey 902 



Cattle-Guard Made of Cactus 905 



Raising Terrapins on the Farm 906 



Consider the Rat 916 



ARCHITECTURE 



The Door to This Siberian Home Is Located on the 



Roof 101 



Circular Farm Garage Built with Silo Forms 187 



Roadtown — The Commuter's Utopia 188 



Unique Shelter for Garden Entrance 292 



Making a Durable Playhouse for the Children 300 



How Sound-Proof Rooms Were Built 329 



Star Spangled Banner in Brick 382 



Like a Spider in His Web 561 



This Store Sets a New Style in Exterior Decoration 671 



Trees in the Forest One Week — Houses the Next. . 735 



A Folding Staircase for the Fire Escape 839 



House Numbers in Concrete 875 



A Miniature Hotel with Two Thousand Rooms . . . 878 



A Chimney with Windows 892 



ASTRONOMY 



How the Sun Looks in the Arctic Circle 164 



What's on the Moon? . 256 



A Laboratory Two Miles in the Air 401 



How Old Is the Earth? 747 



A Parsec — The Greatest Unit of Measurement. . . 807 



Chained to Our Earth I 835 



CHEMISTRY 



A Suitcase Laboratory for the Laundryman 7 



Whiskey from Jam and Potatoes 72 



Mixing a Durable Water Color Aluminum Paint. . 300 

 Manufacturing Prussian Blue from American 



Product 303 



The Chemical Wealth of Some of Our Lakes 407 



The Hottest Heat 414 



Buttons Are Now Made as a By-Product of Beer . . 517 



Getting Sulphur Without Liberating the Fumes ... 671 



Indigo from Michigan 702 



Powder Gases Wash Away Steel Guns . 754 



Making Money Out of a Nuisance. The Industrial 



Rise of Acetylene Ash 848 



Oleomargarine Glorified 877 



Sausage Made from Cottonseed 909 



CIVIL ENGINEERING 



Making Paving Machinery from Odds and End*. . 597 



