444
Drinking Cup, Tin, for the Camp 379
Drinking Trough for Chickens 454
Drip Shield for the Arms 258
Dry Batteries, Another Way to Renew 378
Dry Batteries, Cheap, How to Obtain 410
Dry Batteries, Old, To Renew 401
Dry Batteries, Renewing 367
Dry Battery Cell, How to Make 160
Duplicator for Box Cameras 363
Duplicator, Homemade 240

E
Easel, How to Make 415
Egg-Beater, How to Make 291
Eggshell Funnel 93
Eggshells, How to Preserve 288
Elderberry Huller, Homemade 323
Electric Alarm 94
Electric Alarm, Door Bell and 114
Electric Alarm That Rings a Bell and Turns On a Light 337
Electric Anesthesia 445
Electric Apparatus-Ammeter, How to Make 49, 203
Electric Apparatus-Annunciator, Homemade 57
Electric Apparatus-Annunciator, How to Construct 416
Electric Apparatus-Batteries, Connecting Up to Given Any Voltage 93
Electric Apparatus-Battery Rheostat 80
Electric Apparatus-Battery Voltmeter 153
Electric Apparatus-Bell, Return Call, with One Wire 101
Electric Apparatus-Cats, To Shock 411
Electric Apparatus-Cell, Daniell 252
Electric Apparatus-Circuit Breaker for Induction Coils 101
Electric Apparatus-Controller and Reverse for Battery Motor 72
Electric Apparatus-Controller for a Small Motor 42
Electric Apparatus-Current Reverser 107, 111
Electric Apparatus-Galvanometer, Tangent 150
Electric Apparatus-Induction Coil, How to Make 138
Electric Apparatus-Induction Coils, Mercury
Make and Break Connection for 187
Electric Apparatus-Jump Spark Coil 113
Electric Apparatus-Medical Induction Coil, How to Make 63
Electric Apparatus-Motor, Single Phase Induction 124
Electric Apparatus-Motors, Direct Connected Reverse for 60
Electric Apparatus-Rheostat, Lead Pencil 145
Electric Apparatus-Shocking Machine 139
Electric Apparatus-Thermo Battery, How to Make 59
Electric Apparatus-Thermostat, Small 455
Electric Apparatus-Transformer, 110-Volt 439
Electric Apparatus-Voltammeter, Pocket 330
Electric Battery Massage, Homemade 144
Electric Bed Warmer, Homemade 338
Electric Bell, Relay Made from 94
Electric Blue Light Experiment 47
Electric Clock, Homemade 268
Electric Charges, Detector for 281
Electric Door Opener 78
Electric Engine 276
Electric Experiment, Interesting 377
Electric Experiment, Reversing Switch for 92
Electric Fire Alarm, How to Make 430
Electric Furnace Regulator, How to Make 388
Electric Furnace, Small, How