CONTENTS Continued 



Page 



Centering Tool 84 



Chewing Gum a Puncture Remedy 78 



Correct Lighting for the Dark Room 86 



Dollar-Saving Hint for the Woodworker.... 82 



Drawing an Elipse with a Shadow 89 



Economical Wiring for Bracket Outlets 76 



Electric Signals for Directing Tractors 79 



Emergency Repair for Stuffing Nut 90 



Filling Foundation Trenches 81 



For Bending Wire 77 



Flux for Wire Soldering 76 



A Funnel to Hold Twine 74 



Handy Lock for Lathe Rest 84 



Hints for Motorists 88 



Holds Strainer Cloth in Position 90 



A Home-Made Portfolio 88 



An Ingenious Chisel Cutter 82 



An Ingenious Taper Gauge 76 



Labor Saver for the Washerwoman 90 



Locates Centers of Pipes and Fittings 79 



Lubricant Chart for the Machine Shop 86 



Makeshift Ruby Lamp for Traveling Pho- 

 tographers 78 



Memoranda Holder for the Housewife 86 



A Modern Reminder 85 



Novel Tubes for Loose Couplers 79 



Oxygen Generator 78 



Pipe Scraper 90 



Porcelain Tube Sharpens Knife 88 



Portable Tools in Large Plants 75 



Pulls Whistle Electrically 78 



Punch for Locating Dowel Holes 80 



Safety Hint for Motorists 76 



Serviceable Section Liner 83 



Shoe Polish on Woodwork 74 



"Spirit Shadow" Illusion, The 77 



Temporary Repair for Gasoline Cock 86 



To Bend Tubes Without Kinking 77 



To Lock a Scroll Saw Blade 74 



To Pour Acid Safely from Carboys 85 



To Prevent Poured Lead from Exploding 76 



To Remove a Broken Machine Screw 89 



To Remove Rusty Pen from Holder 82 



To Remove Scratches from Hard Rubber 81 



To Remove Tarnish from Copper 88 



To Renew a File 90 



To Saw Thin Metal Strips 79 



Washer Prevents File Handle Splitting 74 



Wood-Turning Lathe Made from a Sewing 



Machine 73 



MOTION PICTURES 



Moving Picture Acting Not Always Fun 42 



Moving Pictures Helping Education 34 



Municipality Maintains "Movie" Department. 33 



New Wireless Telephone in the "Movies" 34 



Reeling the Drama in Jersey 35 



RADIO SECTION 



Page 



Amateur Wireless Stations 131 



Atlanta Radio Club 141 



Central Radio Association Blue Book 128 



Chicago Radio Club 123 



Elimination of Test Buzzer Noise 137 



Good Strain Insulator 137 



Hot Wire Meter of Simple and Efficient De- 

 sign 135 



Long Distance Wireless Telegraphy 138 



Manchester Radio Research Club 123 



Memorial Fountain to Wireless Operators 130 



Multiple Receiving Tuner 119 



Pittsfield Radio Club 123 



Radio Club of America's Commendable Work 141 

 Spark Gap Efficiency and a New Type Gap.. 124 

 Suggestion -for Increasing Receiving Radius. 129 

 Transmitting Record Due to Freak Condi- 

 tions 129 



RECENT AND IMPROVED DEVICES 



Electric Radiator and Water Heater 70 



Electric Self -Starter 69 



Equipment for Hygienic Ventilation 72 



Fishing Bait of New Design 70 



Fixture for Hanging Bracket Fans 68 



Hot and Cold Water from the Same Faucet.. 71 



Making the Garbage Can Odorless 71 



New Sport for Boys 69 



New Type for Attachment Plug 68 



Ringing Bells and Blowing Whistles Auto- 

 matically 68 



Table Fan of Attractive Design 71 



Watch for Studying Time 72 



RECENT NOVEL PATENTS 



Combination Tool 114 



Convenient Match Box 115 



Convenient Screwdriver 114 



Cuspidor Carrier 114 



Device for Preventing Loss of Tools 115 



Device for Wrapping Paper Rolls 115 



Dresser- Valise 114 



Electric Light Moulding 115 



Hat Pin Point Protector 114 



Improved Egg Beater 115 



Improvement in Casters, An 115 



Kettle of New Design 115 



Milk Bottle Cap 114 



Pedal Controls for Automobiles 114 



Sanitary Soda Cup 114 



Tool for Repairing Tires US 



For Index to Advertisers, see pages 12 and 14. 



Magazine issued monthly. Yearly subscription in U. S., $1.50. Man- 

 hattan and Canada, $1.85. Foreign, $2.00 in Gold. SINGLE COPY, 15 cents. 



THE WORLD'S ADVANCE may be had at all news stands in the United States 

 and Canada; also at Brentano's, 37 Avenue de 1'Opera, Paris. 



Forms close the first of the month preceding date of publication. Ad- 

 vertising rates on application. Entered as second class matter at the New 

 York Post Office, June 25, 1914, under the Act of Congress of March 3, 

 1879. 



The contents of this Magazine are copyrighted and must not be reprinted 

 without permission. 



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