CONTENTS 



Introduction pp. 3-7 



CHAPTER I 

 Magic Lantern with Direct Current 



Fig. 1-38; 1-99, PP. 9-67 



Apparatus and material for Ch. I, i; Works of reference, 2; Magic 

 Lanterns, 3-19; Perfection and brilliancy of the screen image, 20; 

 Suggestions for the lecturer or demonstrator, 21-25; Suggestions to the 

 operator, 26-41 ; Projection of horizontal objects with a vertical objec- 

 tive, 42; Projection with multiple lanterns, 43-46; Moving slides for 

 single lanterns, 47-49; Stereoscopic screen images, 50; Centering the 

 parts of the magic lantern, 51-54; Correct separation of the parts, 55- 

 56; Optical test for centering, 57-58; Centering the vertical objective, 

 59-60; Troubles with the magic lantern, 61-93; Breaking of conden- 

 ser lenses, 94-97; Examples of American magic lanterns, 99, fig. 32- 

 38; Summary of Ch. I, 99,. 



CHAPTER II 

 Magic Lantern with Alternating Current 



Fig. 39-40; 100-119 PP- 68-77 



Apparatus and material required, 100; Comparison of direct and alternat- 

 ing current, 102-103; Installation with alternating current, 104-113; 

 Use of the magic lantern with alternating current, 114-115; Troubles 

 with alternating current lanterns, 116-118; Summary of Ch. II, 119. 



CHAPTER III 

 Magic Lantern for Use on the House Electric Lighting System 



Fig. 41-55; 120-148 pp. 78-99 



Apparatus and material, 120; Magic lantern with small current for home 

 and laboratory, 122-126; Arc lamps for the house circuit, 127-131: 

 Turning the arc lamp on and off, 132-135; Magic lantern with mazda 

 lamp, 136-139; Magic lanterns with Nernst lamp, 140-146; Troubles 

 in Ch. Ill, 147; Summary of Ch. Ill, 148. 



