Richardson's handbook of projection (1930)

HANDBOOK OF PROJECTION FOR This is not fair! It is not right! It is not decent! These men may or may not seek glory. However it is but natural they would like at least to have credit for their accomplishment and it is but right and decent that they have it. I want you men tp know, and I want to now set down the names of such men as I have been able to ascertain positively had some important part in the evolving of the marvelous thing you projectionists now are called upon to handle. I am unable to set forth in much detail the part each played in the discovery and perfection of sound recording and reproduction in synchronism with motion as applied to motion pictures, but I do know that each did play a part, and an important part, too. The great genius of the age, Thomas A. Edison, discovered the basis of the one thing which makes it possible to record and reproduce sound as we are now doing in theatres. In the year 1887 Mr. Edison, in an endeavor to increase the longevity of the carbon filament lamp, made certain experiments with some incandescent bulbs in which two carbon filaments had been installed. In the course of these experiments, in charge of which was a man by the name of William Kennedy Laurie Dickson, then a member of Mr. Edison's research staff, it was discovered that when current was sent through one filament, the other filament was in some manner excited. Many galvanometer tests were made and it was thoroughly established that the effect really was there, and the experiments were filed away for further investigation. That effect was what has become known at "The Edison Effect." It is the basis of vacuum tube action, and to that extent Mr. Edison may justly claim prece vi