Chapter I: Preface

In this volume the authors have attempted to lay before the Motion-Picture Operators and Theatrical Employes generally, a reference and handbook making a specialty of electrical requirements about theaters.

A working knowledge of electricity in general is assumed, and therefore elementary ideas have been treated sparingly. A specialty, however, has been made of all matters peculiar to theaters, and it is thought that theater electricians will find in this volume everything that they need whether they be operating motion-picture machines or switchboards in first-class houses.

The two special chapters “Portable Stage Equipment” and “Theater Wiring” have been arranged so that they are particularly valuable for reference. They should be consulted before undertaking any electrical construction work, either for the stage or for the auditorium. These chapters embody all of the practical knowledge that has come to the notice of the authors in many years of actual experience with theatrical construction.

The aim of this volume has been to present in a simple and practical way the essential principles of Motion-Picture Work.

THE AUTHORS.

Table of Contents

PAGE

CHAPTER I
The Electrical Circuit and Electrical Hazards 9

CHAPTER II
The Arc Lamp 19

CHAPTER III
Projection 31

CHAPTER IV
Motion Pictures 55

CHAPTER V
The Motion-Picture Machine 62

CHAPTER VI
The Film 89

CHAPTER VII
General Hints on Installation, Operation and Care of Machines 96

CHAPTER VIII
Light 113

CHAPTER IX
Principles of Vision 122

CHAPTER X
Reflection 126

CHAPTER XI
Refraction 137

CHAPTER XII
Optical Instruments 147

CHAPTER XIII
Optical Illusions 155

CHAPTER XIV
Theater Buildings 163

CHAPTER XV
Operating Room Equipment 176

CHAPTER XVI
Current Control for Arc Lamps 190

CHAPTER XVII
Management of Generators and Motors 213

CHAPTER XVIII
Theater Wiring 218

CHAPTER XIX
Portable Stage Equipment 311

CHAPTER XX
Useful Facts and Formulas 353

CHAPTER XXI
Glossary of Electrical, Mechanical and Optical Words, Terms and
Phrases 358

Index 385

MOTION PICTURE OPERATION
STAGE ELECTRICS AND
ILLUSIONS