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April, 1930] THEATER LIGHTING 443
Since conventional methods of obtaining of brightness measurements in the theater become a very laborious job, the possibility o~f obtaining measurements photographically was discussed. An investigation of possibilities indicates, however, that for the present at least this method would not be practicable. It appears necessary, therefore, to use portable photometers to obtain the brightness measurements still required by the committee. It is the plan to confine further measurements to a very few theaters in which limiting or good conditions obtain and at the same time combine with them data on comfort and acuity observations made by at least two committee members working together and, if possible, others making observations at the same time.
The recommendations of the Japanese National Committee on Cinema Lighting, presented at the last meeting of the International Commission on Illumination, specified an average intensity of screen illumination of about 2.3 foot-candles. This value is considerably below that obtained in most theaters in this country. Other interesting features of the report are the recommendations that for long pictures the sessions be arranged so that the duration for a continuous viewing shall not exceed two hours, and the inclusion of recommendations on ordinary lighting to the effect that there shall be enough light to distinguish the spectators' countenances, gradual diminution in the lighting of the lamps, and the gradation of intensity between the main auditorium and the exterior of the theater.
Respectfully submitted,
F. BENFORD F. M. FALGE L. A. JONES
A. C. DOWNES R. E. FARNHAM I. L. NIXON
CARL E EGELER, Chairman