INDEX TO VOLUME 89 



Page 

 A Draftsman's I nkstand Which Will Not Overturn 610 

 Improved Method for Decorative Glass Blowing, . 610 

 Renovating Nickel Plate with Tinfoil and Solder. 610 

 Wnal to Do with Small Pieces of Bath Sponge. . . 610 



Keeping Rats Out of the Corn-Crib 611 



Adjustable Overshoes to Prevent Horses from 



Slipping 612 



An Easily Constructed Support for a Trap-Door. . 612 



To Lengthen a Shot-Chain on a Pull Socket 613 



To Make a Dry Battery Having Lasting Qualities 613 

 A Weight and Pulley to Adjust Flexible Lamp 



Cords 613 



Annealing Brass Pipe for Bending 614 



Two Types of Inexpensive Depth Gages 614 



How to Make a Mallet from a Piece of Broomstick 61 5 

 Operating the Oil-Pump of an Automobile by Valve 



Action 615 



How to Make Your Watch-Dial Luminous 616 



Making a Pplisher for Table Cutlery from a Piece of 



Carpet 616 



Benches for Electrical and Mechanical Machinery 617 

 Protecting the Gas Range with a Wind-Shield .... 618 

 A Simple Method of Filing Checks and Receipts . 618 

 Utilizing an Old-Fashioned Flat-iron as an Anvil. 618 



A Canteen Made by a Junior Boy Scout 619 



The Indian's Method of Tethering a Horse 619 



Keeping Your Ties in Good Condi ticn 619 



A Simple Way of Making a Canoe Unsinkable . . . 619 



A Novel Experiment with a Lamp-Bulb 620 



Prolonging the Usefulness of a Saucepan Cover. . . 620 



Removing Old Putty from a Window-Pane 625 



A Too! for Fishing Wires Through Small Openings 626 

 Magnet-Power of Toy Automobiles for Window 



Display 626 



A Switch Operated by Pressure on a Footboard. . 632 

 A Magneto Made from Two Discarded Cannons. . 644 

 Charging Weak Magnetos of Weak Automobiles. . 672 

 Making the Water from a Faucet Vibrate Fifteen 



Times a Second 730 



Field Photograph Kit for the Use of the Artillery. 739 

 A Show- Window Advertising Device Operated by 



Gas Bubbles 760 



How Electricity and Temperature Affect a Watch , 76 I 



A Foot- Warmer Attachment for a Radiator 761 



A Combination Tool with Many Uses 762 



Marking Points to Bore Holes for Dowels 762 



Painting a Ladderless Standpipe 762 



Making a Serviceable Fireless Cooker 763 



To Keep the Water in the Aquarium Clean .... 763 



Loosening a Wood Screw to Draw It Easily 764 



Transforming a Wheelbarrow into a Fantastic Toy 764 

 Constructing a Sidecar for a Bicycle or Motorcycle 765 

 A Fire and Water-Proof Cement for Mending Stove 



Fire-Brick 766 



An Improved Grinder for Gas-Engine Valves. . . . 766 

 A Revolving Telephone Index on the Transmitter 766 



How to Build a Stereopticon 767 



A Substitute Blow Torch for Soldering Joints. . . . 772 



To Make a Storm Vestibule on a Veranda 772 



An Easy Method for Drilling Holes in Glass 774 



An Emergency Clothes Hanger for the Traveler. . 774 

 Utilizing a Piano Stool as a Typewriter Stand. . . . 774 



An Automatic Cleaner for Bicycle Hubs 773 



A Heat Deflector for a Hoi Air Register 775 



How to Straighten the Crooked Straws of a Broom 775 

 An Improved Force-Filter Which Is Easily Cleaned 775 

 A Scheme for Soldering Metals Difficult to Join. . 775 



Plane Blade Clamp and Emery- Wheel Guide 776 



A Hallowe'en Chamber of Horrors 777 



An Alarm-Clock Dinner Bell for Old Dobbin 779 



An Experiment with the Static Electricity from 



Belts. ... 779 



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

 Brackets for Double Shceln of Wrapping Paper. . . 780 

 Keeping Rousted Peanuts Hot on a Steam Radiator 780 

 Making Storm Sashes from Old Shutter-Frames. . 781 

 Gc-tting Maximum Service from a Typewriter 



Kibbon 782 



Lubricating Automobile Spring Shacklcii and Bolts 783 

 A Pocket I'lash-Luinn on the Bicycle Handlebar. . 79' 

 F.ntiinating the Speed of Fussing Automobiles . . . ?84 

 A Practical Pulverizer Made from u Cutter-Bar. . 784 



Dc-Sutphating Storage-Battery Plates 787 



Init'ilutcd Plicr IHondlen with rune Cases 788 



A Home-Madc hlood-Light Projector 788 



Making an Alternate Current Buxzer from Old Bell 



C oiln 788 



PaRc 



Caring for Storage Batteries in Automobiles 792 



Discarded Type-Cases in the Amateur's Shop .... 792 



A New Method of Reviving Old Dry Batteries. . . 793 



Amateur Trench Electricians 794 



Avoiding Clouded and Grimy Ceilings 796 



To Prevent Asphaltum in Cans from Evaporating 79& 



The Construction of a Small Concrete Corn-Crib. . 800 



Utilizing the Waste from Welsbach Mantles 841 



A Quick Method for Measuring Light 648 



Making Decorative Butterflies in Sheet-Copper. 921 

 Repairing Automobile Tires to Prevent Bulky 



Places 92 1 



Grinding Automobile Engine-Valve Seats Set in 



a Sleeve 922 



Making Flexible Mirrors from Tinfoil on Celluloid 922 



A Water-Barrel Elevator in a Well 923 



Secret of Success in Filing Cross-Cut Saws 923 



A Toy Bank of Wood Made Without Nails 924 



Making a Wood-Burning Heater for the Home. . . 924 



Making the Vibrations of the Voice Draw Designs 925 



Friction Tape Used for Plaster Strips 925 



A Home-Made Heating Arrangement 926 



How to Make a Pendulum Swing Easily 926 



Starting an Automobile When One Rear Wheel Is 



on Ice 926 



Lifted Tread Sections in Making Automobile Tire 



Repairs 926 



A Motorcycle Bob 927 



Filtering Gasoline Through Chamois. Dangerous. 930 



Photographic P'inting Masks Easily Made 931 



Making Extended Index Tabs for Books 932 



Removing Collar on Change-Gear Spindle of Lathe . 932 

 Changing a Boy's Handcar Into a Mechanically 



Propelled Sled 933 



Removing a Bushing from a Blind Hole 933 



A Fountain Attachment for Ordinary Pens 934 



A Dark-Room Lamp Used Under a Glass Tray. 9^4 



A Sanitary Home-Made Toolh-Brush Holder. . . , 934 



Substitutes for the Ordinary Carpenter's Levels.. 933 



A Good Substitute for a Solid Round Belt 935 



To Prevent Steel from Rusting After Soldering . . , 936 



Luggage-Carrier to Attach to Your Bicycle 936 



Automobile Carbureter for Heavy Fuel Oils...... 936 



How to Make a New Bureau from an Old One. . . 937 



A Revolving Washer Made from an Old Rim 937 



A Quickly Made Silver-Plating Powder 937 



Replacing a Knob on an Aluminum Kettle Top. . 938 



Grooves Necessary in Giant Motor-Truck Tires . 938 



Making Screws Hold in the End Grain of Wood. . 9*8 



Adjusting a Storm Sash from the Inside of a House 9^8 



A Snow Shovel Keeps the Snow from Sticking. . 93'> 



Eliminating Trouble with Toilet Flush-Tanks .... 940 



A Makeshift Syphon 940 



Utilizing the Waste Heat from an Open Fireplace. 940 



Aluminum Alloy for Patterns and Core Boxes... 940 



Building a Speedy Ice- Yacht 94 I 



Preventing Exposed Water-Pipes from Freezing.. 945 



How to Handle Sulphuric Acid with Safety 945 



Milk as a Lubricant for Drilling in Copper 94t> 



Lubricating the Working Joints of a Pocket Knife 94h 

 A Puller to Remove Steering Wheels on Auto* 



mobiles 946 



Compressing Leaf Springs to Bolt Them 94b 



Intensifying Magnetic Fields for an Automobile 



Dynamo 948 



Pluns of a Small Modern Dairy Barn 960 



RADIO COMMUNICATION 

 The Construction of an Improved High-Tension 



Audion Battery I 3 I 



Making a Mechanical Interrupter I 38 



A Simple Anchor-Gap I 38 



Temporary Variable Condenser I 38 



A Delicate Crystal Detector I 39 



A Leud-in Connector I 39 



Mounting a Rotary Gap 1 i9 



Radio in the Far South 139 



An Unusual Code Letter. ^ 139 



Greater Speed in Wireless Receiving I 40 



Receiving Undamped Oscillations |40 



Compact Condensers |42 



The I3e»t Crystal Detectors I44 



What Radio Rrnders Want to Know l-»5 



Winners in the Kndio Prize Contest 272 



A WirelcHs Telegraph Transmitter with Tvro SfMirlc 



Freciuenrim 2* ^ 



A Booth for Long Dintance Receiving . 2'4 



