Life Buoy, How to Make 432
Life preserver, Homemade 4
Light Gas without Matches, To 394
Light, Post or Swinging, Homemade 189
Light Trick, Invisible 251
Lightning Arrester, How to Make 122
Lightning, Photographing 124, 176
Lights, Turning On and Off from any Number of Places 310
Linoleum, How to Repair 273
Liquids-Splashes, Study of 164
Lock, Automatic 106
Lock, Electric 60, 110
Lock, Electric, for a Sliding Door 89
Lock, Homemade Pneumatic 65
Lock, Lubricating 151
Lock, Secret Door 6
Lock, Spring, Protection of 72
Lock, Trunk, How to Attach 134
Lock, Window 397
Locking Several Drawers with One Lock 314
Locomotive, Miniature Electric, How to Make 165
Log, To Cross Stream on 94
Lubricant for Wood Screws 137
Lubricate Sheet Metal, To 69
Lubricating a Lock 151

M
Machinery, To Remove Grease from 216
Magazine Binder, To Make 406
Magazine Clamp, How to Make 435
Magazine, How to Bind 40, 56
Magic Box Escape 7
Magic-Electric Illusion Box 135
Magic Lantern, Homemade 328
Magic, Old Time 167, 175, 176, 179, 193, 198, 234,
   244, 251, 256, 427
Magic, Parlor, for Winter Evenings 90
Magic Spirit Hand 2
Magic-Violin, Making Spirits Play 295
Magnet for the Work Basket 292
Magnifying Glass, Emergency 305
Magnifying Glass, Homemade 397
Mahogany, Filler for 139
Mail Photographs, How to 312
Mail, Sending Coins by 287
Marble, Rolling 191
Massage, Electric Battery 144
Mat, Wrestling 330
Match, Chain Made from 311
Match Holder of Wood and Metal.  How to Make 282
Match, How to Relight 444
Match Safe, Homemade 194
Mathematics, Finger 181
Mattresses, Handling 19
Measuring the Height of a Tree 376
Medical Induction Coil, How to Make 63
Mercury Make and Break Connections for Induction Coils 187
Merry-Go-Round, How to Build 359
Merry-Go-Round Swing.  How to Make 131
Merry-Go-Round Thriller 209
Merry-Go-Round Whirl on Ice 380
Metal Coverings for Leather Hinges 41
Metal Inkstand, Ornamental 315
Metal, Melting in the Flame of a Match 449
Metal, Pierced, Letter Holder of 294
Metal, Sheet, Sawing 291
Metal, Sheet, To Lubricate 69
Metal, Thin Sheet, Cutting Circular Holes in 35
Metal Whisk Broom Holder 221
Metals, Soft, How to File 406
Metals, Use of Kerosene In Polishing 364
Mice and Rats, Killing 293
Micrometer, Homemade 130
Microscope, Homemade 433
Microscope, Small, How to Make 408
Microscope without a Lens 76
Minnow Trap, How to Make 390
Mirror, Experiments with 434
Model Aeroplanes.  Equilibrator for 11
Model Steam Engine 1
Model, Steamboat 216
Model Work, Gasoline Burner for 55
Model Work, Gear for 225