ld for 258
Arrowhead, Flint, How to Make 23
Asbestos Table Pads, Homemade 212
Athletes, Weights for, How to Make 274
Atomizer, How to Make 158
Automobile, Boys' Homemade 402, 430
Automobile Engine, Cooling Water for 236
Automobile, Greasing the Front Wheels of 320
Automobile Headlights, Adjusting 217
Automobile, Painting 357
Automobile with Sails 326
Axle, Cart without 291

B
Babbitt Ladle, Emergency 264
Babbitt, Ladle for Melting 173
Bag, Changing, for Plate Holders 212
Bag, Sewing, How to Make 386
Bags, Paper, Use for 19
Balloon Ascension Illusion 300
Balloon, Pilot, How to Make 118
Balloons, Paper, How to Make 215
Barometer, Homemade 151
Barometer, How to Make 188
Barrel Stave Hammock 75
Barrel Stave Sled 383
Baseball, Playing with a Pocket Knife 250
Baseball Throwing Practice, Device for 312
Bath. Shower, To Make 15
Bathtub Stopper, Substitute 429
Batteries, Connecting Up to Give Any Voltage 93
Batteries, Dry, To Obtain Cheaply 410
Batteries, Dry, To Renew 369, 378, 401
Batteries, Gravity, Why Fail 115
Battery Binding Posts, Wire Loop Connections for 449
Battery Cell. Dry, Making 160
Battery Connections, Wire Terminals for 168
Battery, Grenet, How to Make 83
Battery Motor, Controller and Reverse for 72
Battery Motor, Reversing 405
Battery, Non-Polarizing, How to Make 151
Battery Rheostat 80, 445
Battery, Small Storage, How to Make 121
Battery Switch 99
Battery, Thermo-Electric, How to Make 59, 140
Battery Voltmeter 153
Battery Zincs, Old, To Use 87
Bed Warmer. Electric, How to Make 338
Beeswax, Substitute for 129
Bell, Cracked, Restoring Tone to 71
Bell, Return Call, with One Wire 101
Bell Ring Register 316
Bell, Ringing by Touching a Gas Jet 403
Belt, Eyelets for 432
Belt Lace Caution 239
Belt, Round, To Make without Ends 243
Bench Lathe Made of Pipe Fittings 316
Bicycle Catamaran 145
Bicycle Coasting Sled, How to Make 231
Bicycle Frame, Enameling 385
Bicycle, Runners on 157
Bicycle, To Attach a Sail to 425
Bicycle, Trailer for 397
Bicycle Trouser Guards for Sleeve Bands 283
Bicycle. Water, How to Make 335
Bill File Made of Corkscrews 315
Bind Magazines, To 40, 56, 406
Bird House, Proper Design for 201
Bird Houses, Clay Flower Pots Used for 277
Bit, Gouge Used as 411
Blotter Pad, Corner Pieces for 8
Blotting Pad, Desk 17
Blowpipe, Homemade 428
Blueprint Lantern Slides, How to Make 120
Blues, prussian and Chi