all Model Work 50
Coil. Jump Spark 113
Coils, Forming to Make Flexible Wire Connections 443
Coin and Card on the First Finger 175
Coin and Tumbler Trick 378
Coin, Changing Button Into 234
Coin, Disappearing 176, 193
Coin In a Wine Glass Trick 167
Coin, Moving under a Glass 214
Coin Purse, How to Make 354
Coin, Sticking against Wall 176
Coin, Sticking to Wood by Vacuum 287
Coins, Display Rack Shows Both Sides of 220
Coins, Sending by Mail, Safe Method of 287
Compass, Mariner's 170
Compass Needle, Floating 160
Compass, Substitute for 289
Compressed Air Phenomenon 111
Concrete Kennel 23
Concrete Swimming Pool 178
Conservatory, Window 103
Controller for a Small Motor 42
Cook Fish, One Way to 206
Copper Bowl, How to Make 185
Copper, Hardening 206
Copper Picture Frame, Etched, How to Make 414
Copper Trays, How to Make 180
Copper Work--Corner Pieces for a Blotter Pad 8
Cord. Buttoned 427
Cork, Boring, Holes in 8
Cork, Clamping 33
Cork Extractor 300
Corks, How to Fit 368
Corkscrews, Bill File Made of 315
Corner Pieces for a Blotter Pad, How to Make 8
Cot. Canvas, How to Make 154
Counter Brush for a Shop 419
Crossbow and Arrow Sling, How to Make 339
Crutch. Homemade 369
Crutch Made of an Old Broom 352
Crystallization, Instantaneous 288
Cup and Saucer Rack, How to Make 105
Cup, Tin Drinking, for the Camp 379
Current Reverser 107, 111
Curtain Roller 419
Curtain Roller Spring, How to Tighten 79

D
Dance, Miniature War 255
Darkroom Lantern, Homemade 14, 340
Darkroom, Photographic, Building 26
Demagenetizing a Watch 166
Desk Blotting Pad 17
Developing Box, How to Make 220
Developing Tray, Cracked Composition, To Repair 260
Developing Tray. Photographic 269
Dish Holder, Hot 7
Dogcart, Homemade 160
Dog, How to Chain 257
Dog's Bark, Drowning with Water 435
Dogs, To Drive Away 106
Door Bell and Electric Alarm 114
Door Lock, Secret 6
Door Opener, Electric 78
Door Opener for a Furnace 83
Door, Sliding, Electric Lock for 89
Dovetail Joint 29
Dovetail Joint Puzzle 236
Draft Opener, Automatic 102
Draftsman. Spline for 406
Draftsmau's Ink Bottle Cork, Steel Pen Used In 117
Drawers, Several, Locking with One Lock 314
Drawing, Aid In 270
Drawing Instrument-Wondergraph, How to Make 436
Drawing, Landscape, Made Easy 449
Drill Gauge, Handy 252
Drill, Hand, How to Make