THE WORLD'S ADVANCE 



Formerly Modern Mechanics 

 239 Fourth Avenue New York 



A CONSOLIDATION OF: 



Popular Electricity and the World's Advance 



Modern Electrics and Mechanics 



Electrician and Mechanic 



ORLAND J. RIDENOUR, President 



AUSTIN C. LESCARBOURA, Editor 



Volume XXXI 



JULY, 1915 



No. 1 



CONTENTS 



Page 

 Armored Car That Can Be Driven from 



Either End 6 



Building Machinery from Book and Maga- 

 zine Instruction 45 



Celilo Canal, The 51 



Cement and Concrete About the Home 10 



A Census of Poles 64 



Combating Submarines with Kites 49 



Compressed Air Blows Ballast Under Tracks 54 

 Counterfeiting U. S. Money on Turkish Tow- 

 els 116 



A Craftsman Summer Cottage 91 



Curious Action of Falling Bodies 54 



Dirigible Headlights for Automobiles 116 



Electric Drive for the Battleship of the Fu- 

 ture 59 



Electric Lights for the Summer Cottage 106 



Electrical Entertainer's Program 109 



Electricity Everywhere 47 



Electricity in Horticulture 11 



Electricity in Stagecraft 109 



Federal Jurors Eat Cake Made of Eggs Ten 



Years Old , 



Flameless Heat 



A Folding Bungalow 1 



For the Handy Man 106 



Gasoline Engine Operates Deck Girder Bridge 48 



A Gasoline-Operated Tamping Machine. 13 



Great Britain Building Big Jamaica Radio.. 51 



A Gridiron Lamp H 



Growing Grapes on Sand 116 



High Frequency Apparatus 11 



The Highest Dam 112 



Home Craftsman, The 91 



A Home-Made Tractor 



How a Military Rifle Is Loaded 7 



How to Build a Cycle Car.. 97 



An Improved Brake 96 



Improvised Electrical Plants for War 52 



Inspecting a Well 3 



A Mangier With a Safety Guard 58 



A Marine Harvester 45 



A Modern Bank Vault Door 43 



Motorcycling a Mile High 8 



Page 



A New Design of Electric Switch 7 



Panama-Pacific Exposition Notes 65 



Perfect Timepieces 9 



Plant Culture by High Frequency Current... Ill 



Portable Electric Shade Washer 53 



Practical Electro Therapy 113 



Questions and Answers 117 



Reducing the Human Element in Modern 



Printing 27 



Review of Uncle Sam's Battle Fleet 55 



A Revolving Crane Mast 44 



Running a Stream Beneath a Stream 50 



Safety Lock for Sledge Hammers 52 



A Sales Garden That Brings Business 12 



A Scale in Which Electricity Does All the 



Work 48 



Science Helping the Diver to Go Deeper 3 



Short Circuits 143 



A Spring Which Flows Gasoline 108 



Startling Advertising 64 



Steel Reinforcing in Concrete 58 



Steel Towers for Government Radio Stations. 63 



Study of Geography Made Interesting 46 



Taking the Chill Out of the Morning Bath.... 8 

 Three-Century Old Clock Keeps Perfect Time 14 



Tidal Transportation 64 



Tiny Electric Trucks Handle Heavy Expo- 

 sition Freight 2 



Torsion-Testing Machine 47 



The Tree Summer Seat 47 



Twenty-Year Calendar, A 64 



Vertical Drafting Board, A 44 



Whale Cuts Off Submarine Connection 6 



What the World is Doing 142 



World's Greatest Dreadnaught, The 8 



World's Picture Gallery, The 15 



FOR PRACTICAL WORKERS 



Acid Ink Eraser 89 



Automatic Door for Chicken Coop 81 



Bent Spring Holds Door Ajar 85 



Boat Propelled by Foot Motor 90 



Broom Holder Made from Spring Wire 88 



Brush Holder 85 



(Continued on page 10) 



Copyright, 1915, by The Modern Publishing Co. 



