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THE FUNDAMENTAL PRINCIPLES OF
lighting. Light schedules, for that reason, are very important and must be changed continually with the seasons of the year, and the advertising value expected from your various signs and exterior lighting. General schedules for the turning off of exterior lights are sent out from the office of the Supervisor of Theatre Management. We have experienced difficulty in the past in drawing up schedules from this office for the turning on of exterior lighting. That must necessarily rest in the hands of the theatre manager. On very dark and overcast days it may be necessary for you to burn your exterior lights from the time your house is opened.
During the opening hours of your theatre after consideration of your show, and the care with which your patrons are served, your next most important consideration is that of proper ventilation. It is practically a uniform requirement throughout the United States that twenty-five cubic feet of air per minute per person be supplied to those in your theatre. Just the quantity of air is not sufficient in order to give good ventilation.
Ventilation is primarily composed of three conditions — a dry bulb reading, air circulation, and humidity. We will discuss briefly these three conditions in order to give you a clearer understanding of your responsibility in maintaining proper air conditions in your theatre.
Dry bulb reading is the reading obtained from any thermometer with which you are all familiar. It merely gives you the degree of warmth or coldness of the air in your theatre.
Air circulation is of primary importance for two reasons: first, to eliminate dead air, and second, for the elimination of drafts. The ideal condition is one of absolute uniform distribution of twenty-five cubic feet of air throughout your auditorium and building.
Humidty is a condition which is not generally familiar to everyone connected with theatre operation, but is of great im'
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BALABAN 6? KATZ THEATRE MANAGEMENT