Page 



An Ingenious Rain Alarm 65 



Illuminating the American Flag 72 



What One Penny Will Buy in EUectrical Service . . 73 



A Small Backyard Searchlight 121 



Thawing Frozen Water- Pipes Electrically 145 



An Electric Alarm Signal for the Fisherman 149 



Elstimating the Windings of the Electromagnet 



Coils I 50 



A Means of Indicating the Location of a Bell Call 151 

 Combining the Telephone Receiver and Trans- 

 mitter in One Instrument 187 



Next Summer's Ice. They Are Cutting It Now 



with Electricity 197 



A Flashlight to Show the Position of Talking- 

 Machine Needles 200 



Why Are Abandoned Flour Mills Not Utilized as 



Lighting Stations? 201 



Remember Electrically 212 



Illuminating the Statue of Liberty 213 



An Electric Headlight for the Up-to-Date Horse. . 242 

 Making a Bungalow Unpopular with Night Prowlers 250 



What a Circuit-Breaker Really Is ...... 250 



Locating Buried Objects with a "Telepipe" ...... 262 



Utilizing Tin Cans to Make Containers for Dry 



Batteries 283 



Easily-Constructed Step-Down Transformer 307 



One Telephone Used on Two Lines 307 



An Electric Lamp-Socket Lock Clamp and Seal . . 308 



Remover for Insulation on Electric Wires 308 



An Easily Made Adjustable Telephone Condenser 313 

 How to Keep the Telephones from Humming .... 313 

 An Electric Gas Lighter Operated with a Push- 



Button 314 



An Electric Circuit for a Freezing Alarm 315 



Makeshift Motor Starting Box for Burned-Out 



Rheostat 315 



Making a Miniature Light to Attach to a Book. . 316 



What the First Telegram Said 343 



Helping the Deaf to Hear with a New Electrical 



Ear._ 353 



A Frictionless Contact Generator of Static EJec- 



tricity 372 



This Electric Coal-Bagging Machine Saves Labor 436 



Electric Steel from Electric Furnaces 438 



Magnetic Base for a Machinist's Electric Light . . . 442 



Electricity Used to Start a Balky Horse 448 



How to Make an Electric Heater 469 



Cutting Holes in Plaster for Switch-Boxes 473 



An Electric Comb for Drying the Hair After the 



Shampoo 573 



A New Gun Flash Light 583 



Dynamo Lighting System for a Motorcycle 601 



Power Measurement Method Without a Watt-Meter 633 

 An Emergency Electric Plug Made of Broken Lamp 634 



An Inexpensive Tester for an Electric Lamp 634 



Electromagnetic Rotation of an Electrolyte 640 



Toledo Plants a Baby Moon in the Sky 665 



Determining the Best Lighting Conditions for the 



Eye 726 



The Automatic Furnace- Watchman 734 



A Portable Electric Welding Apparatus 734 



To Cure a Balky Horse Just Press a Button 753 



Experiments with Static Electricity from Belts. . . 787 

 Making a Hot Wire Ammeter for Electric Currents 788 

 Interesting and Instructive Electrical Experiments 789 



Laying Telegraph Cables Under Fire 803 



The Simplified Turbine for Small Electric Plants. . 919 

 The Construction of a Fifty-volt Storage-battery. 947 

 A Light Signal to Designate a Blown Fuse ....... 950 



Changing a Direct Current Bell into an Alternat- 



.ing One 951 



How to Make a Solderless Joint on Wire 95 1 



Testing Bell Circuits with Dividers 951 



HOUSEKEEPING MADE EASY 



Putting the Sun at Work in the House 4 



Household Appliances 38—39 



A Miniature Power-Plant for the Home 71 



A Heat Regulating Device for the Furnace 122 



The Tea-Table Idea Applied to the Kitchen 141 



A Water-Heating Garbage Burner Is Both Useful 



and Sanitary 187 



A Ladder Which Can't Slip or Fall Over 191 



Drying the Family Washing Around the Stove. . . . 202 

 A Machine Which Takes the Backache out of Car- 

 pet-Beating 202 



Household Appliances 21 0-2 1 1 



Page 



Beating Yolks and Whites Simultaneously 224 



A Double-Decked Serving Tray 224 



Dachshund Charlie. He Eats 'Em Alive 230 



A Simple Teakettle Attachment 236 



Is Your Closet-Room Scarce? Try this Type of 



Wardrobe ; 237 



Install a Motor-Driven Bootblack in Your Home. 239 



A Soap That Blues the Clothes 242 



You Can't Find Your Brushes or Your Razor in 



Your Bag? Then Try This 255 



Ensnaring the Ashes of a Cigar as You Smoke . . . 280 

 You Don't Need to Dig in This Bag to Find What 



You Want 345 



Housekeeping Made Easy 358-359 



How the Bath-Tub May Be Transplanted 361 



A Novel Foot Radiator 374 



A Fan on the Sewing Machine Flywheel 413 



An Overhead Trolley System for the Hot Iron. ... 413 

 Make a Hanging Window Garden of Discarded 



Sponges 428 



Ironing a Four-in-hand Tie to Prevent Glossy 



Streaks 443 



Keeping Your Plants Watered While You Are 



Away 452 



How to Remove Stains from Various Kinds of Cloth 462 

 A Clever Woman Discovers Handy Location for 



the Kitchen Towel 464 



Making Parallel Bars for the Home Gymnasium . . 465 



Household Appliances 558—559 



A New Use for Rhubarb. You Can Clean Pots 



with 1 1 564 



A Crib, Baby Carriage and Bassinet All in One. . . 582 



Disappearing Beds of the Cozy Apartments 589 



Tea Kettle with Whistle in Spout for a Signal .... 604 



A Coffee Percolator that Never Runs Dry 685 



The Ceiling Bed 697 



Housekeeping Made Easy 718-719 



Steam-Heat the Wallpaper to Tear It Off 748 



Vacuum Cleaning by Foot Pressure 750 



Household Water-Still of Easy Construction 775 



To Prevent the Corners of a Rug from Curling. . . . 777 

 Making a Substitute Wood Handle for the 



Dustpan 780 



A Fountain Shoe-shining Outfit 851 



Household Helps 872-873 



A Pipe-Cleanine Wire Which Worms Its Way 



Around Bends 888 



A Concrete Cooler Which Chills by the Action of 



Evaporating Water 911 



Serving Individual Portions of Butter by Ma- 

 chinery 912 



This Type of Bottle-Stopper Is a Fraud Detector . . 915 



MECHANICAL ENGINEERING 



Painting Piping by Machine 5 



Efficiency Methods in Hauling and Scouring as 



Employed on the Water 18-19 



A Self-Starting Typewriter 48 



Doing Away with the Pick and Shovel in Elxcava- 



tions 54 



It Bites Its Way Through the Thickest Ice 69 



A Mechanical Telephone Operator 73 



A Mechanical Rock- Worm 78 



Saving Natural Gas with Muddy Water 94 



Filling in Trenches by Machinery 96 



The Popularity of Liquid-Measuring Pumps 184 



The Origin of the Locomotive Whistle 187 



Digging War Trenches with a Powerful Tractor. . 191 



Keeping Track of Piece Work 1 99 



Finishing a Collar by Machinery 218 



Mechanical Helps 278-279 



Doe-Power for Scissors Sharpener 325 



A Trip to Sugar Loaf Mountain 334 



New York's Street Sweeper and Flusher 374 



Measuring Sloping Roofs Without Breaking Your 



Neck. 391 



Improvising a Compressed Air Tank 393 



Feeding a Fire with Hot Air to Save Coal 396 



Mechanical Helps 383-3 SI 



New Concrete Mixer Efficient for Small Jobs .... 427 

 Building a Street Car Line W ithout Stopping Work 



or Cars 435 



A Meter for Registering Amounts of Coal Used. . 435 



Making Cigars by Machinery 504 



Fighting in the Dark with Night Lights 534 



Pulling the Trigger with the Thumb 534 



Shooting the Gasoline Gun 534 



