Light Intensities for Motion Picture Projection
J. T. Cardwell, R. P. Burrows · Transactions of the Society of Motion Picture Engineers · 1917
I have been invited to address you on the subject, “Light Intensities for Motion Picture Projection”—a subject which is of very real importance but concerning which there is a scarcity of data. The best I can do, therefore, is to discuss the factors affecting light intensities and draw from this discussion tentative conclusions for your consideration.