Word: illuminatione
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"The human eye does not function to its best advantage in the dark or in looking at a fairly well illuminated object when the eye itself is surrounded by darkness," according to Mr. Henry. "There should prevail as high a degree of general illumination as may be consistent with securing...
"Too low illumination causes dilation of the pupil to an abnormal degree and provides a coreal area which does not permit of focal accuracy and which tends to distortion of outline. To partially overcome this, segmental action of the ciliary muscle governing the focusing of the eye is induced. Such...
"The illumination of the auditorium should be gradually reduced from the rear to the front and all light sources so modified as to prevent glare, especially those which may fall within the spectator's range of vision. A faulty shade leaking a little light in the orchestra or over the...
"The decorative scheme of the auditorium naturally affects the general illumination. Gilt and silver even in subdued light may produce annoying reflections and, in some instances, these are responsible for an unfortunately low degree of lighting.
"Investigations reveal that managers of motion pictures have no scientific way of determining whether or not the general illumination of the auditorium is what it should be and, in fact, this is governed by the judgment of the management which may take into consideration certain factors and entirely disregard others...