n the illustration, thus obviating the use of
heavy paraphernalia as in the cradle attachment. The cradle
attachment is also generally accompanied by a 2-in. iron bar, used
in the place of the plate glass, the performer or operator
standing at the rear of the couch to conceal the bar as it comes
from beneath the stage. However, the method illustrated is the one
generally used.

The solid hoop is passed over the body in the following manner:
Start at the end, B, Fig. 2, passing the hoop as far as C with the
hoop on the outside of the back horizontal rod. The side of the
hoop toward the audience is then turned and swung clear around
over the feet at A and entered between the rod and board on which
the lady rests. The hoop is then carried as far as it will go back
toward the end B. Then the side nearest the operator is passed
over the head of the body apparently the second time and passed
off free at the feet. Thus to the closest observer the impression
is given that the hoop has encircled the lady twice. The
illustrations give in detail the working of the illusion above the
stage floor. No set rule is used for the tackle and drum below the
floor.

CONTENTS

A
Accelerometer, Simple 93
Acid Burns, Treating 126
Acetylene Gas Generator, Homemade 57
Acetylene Lamp, Lighting 401
Aerating Water in a Small Tank 241
Aeroplane, Paper, How to Make 329
Aeroplanes, Model, Equilibrator for 11
Alarm, Burglar, How to Make 368
Alarm, Callers' Approach 87
Alarm Clock Chicken Feeder 79
Alarm Clock to Pull Up Furnace Draft 107
Alarm, Electric 94
Alarm, Electric, Door Bell and 114
Alarm, Electric Fire, How to Make 430
Alarm, Electric, That Rings Bell and Turns On Light 337
Alarm, Electric Time 433
Alarm, Fire 47, 359
Aluminum Polish 428
Aluminum, Satin Finish on 198
Aluminum Wire, Insulating 306
Ammeter, How to Make 49, 203
Amusement-Boys Representing the Centaur 173
Amusement Device--Merry-Go-Round Thriller 209
Amusement Device--Merry-Go-Round, To Build 359
Amusement Device--Teeter Board. Revolving 297
Anesthesia, Electric 445
Animals, Small, Trap for 82
Annealing Chisel Steel 362
Annunciator, How to Construct 57, 416
Aquarium, How to Make 64, 210
Arbor, Grape, How to Build 73
Arc Lamp, Homemade 132
Arc Searchlight, Self Lighting 9
Arms and Armor, Imitation:
Part I 235
Part II 242
Part III 248
Part IV 263
Part V 271
Part VI 279
Part VII 284
Arms, Drip Shie