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cuse this body from acting. I would respectfully suggest the following: the letters E X I T on plain ground glass, the letters to be of size to comply with local law, and to be blocked out in black, so that light shows through the letters only. Behind the ground glass bearing the letters and between the letters and the illuminant, there to be a sheet of dark ruby glass, or two thicknesses of standard photographers ruby glass. This allows only the letters E X I T to be visible to the audience and in dark red.
Still another proper subject for standardization is the width of black border for screen.
In the operating room itself, aside from machinery, etcetera, the observation ports are in sad need of standardization, both as to width and height from floor, though the latter is difficult by reason of projection pitch. The operating room size also needs attention. Present standards were adopted while projectors were very much smaller than at present. Operating rooms should be not less than nine (9) feet front to back; ten (10) would be better.
Operating room ventilation standardization is necessary, both from the standpoint of health and fire hazard. The state law of Massachusetts will form an excellent basis for study of this subject.
There are other things I might mention, but it seems to me I have said enough (perhaps you may think too much) for one time. I would, however, again utter warning as against adopting standards from the purely theoretical point of view. I have for many years preached to projectionists the gospel of combining theory with practice. I now respectfully ask this body to apply that doctrine in reverse. Be very certain that practice, as it is, will combine at least fairly well with theory, before setting up a standard which, while theoretically perfect, will fail when placed in actual operation under the conditions prevailing.
3S