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vi FOREWORD
A related aim of this book, therefore, is to analyze and clarify many problems upon which the future of the new art must be established.
Feeling as I do that a pioneer volume in a new field should serve every possible variety of demand, I have deliberately widened the scope to the utmost. Accordingly I believe that these pages will serve almost every one interested in the subject at least to some degree. It is therefore only natural that some portions of the text, introduced with a special public in mind, will be of less interest to some other reader of different need. For example, the two chapters on operation and maintenance that conclude the division on the theatre are intended solely for the professional exhibitor. Certain paragraphs, likewise, in connection with the apparatus of production and reproduction are designedly technical. I do not see how these could very well be omitted without diminishing the value of my message to the industry. Since it is my hope to render practical as well as general information, I accordingly offer scientific detail together with matter of wider appeal.
My aim is first to provide the professional worker with either a full reference or a sure guidance, depending on his period of acquaintance with sound. If he be a "veteran," here is the record for him to review; if a newcomer, here are the lessons he must learn. In employing a word from the classroom I am especially mindful of those who are already entering our ranks through the gate of university or other institutional training. Knowing that their number is growing and will continue to grow, I have attempted to provide for their ready instruction a manual suitable for survey. With that purpose in view, I have been careful to organize the chapters into groups and the whole book into an organic unit.
Naturally, a good moving picture man never loses sight of