Richardson's handbook of projection (1930)

962 HANDBOOK OF PROJECTION FOR instruction be supplied the men now handling sound equipment, or who soon will be called upon to handle it. They, in fact, have the right to expect, and even to demand, that this be done. Everything considered, therefore, this work has been undertaken, and will be made as complete as it is possible to make it. It would be very easy to compile a mass of general radio matter, written in engineering terms, and thus make a bulky, showy volume. I am including no such matter, however, because I do not regard that sort of thing as either honest or efficient. This is not a radio book. It is a sound-in-synchronization-with-motion book, and while there is of course a considerable similarity, in a general way, between it and radio, still the fields are wholly separate and their problems for the most part entirely different. In this book the various systems now in use will be dealt with, and the matter concerning each of them will be examined by and have the approval of their engineering department, insofar as has to do with technical matters. You may therefore know that what you find herein along these lines is correct at the time of its writing. First of all let us discuss the differences in requirement as between silent picture projection and the projection of silent pictures (all pictures are really, of course, "silent") with synchronized sound accompanyment. Let us consider, whether or not, more is demanded of men engaged in one than in the other; whether or not all those who have been able to hold their own in the silent picture projection field may reasonably expect to be successful in synchronized sound projection.