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Some observations were made during the course of the experiments which will probably upset some of the existing conventions and increase the comfort of the motion picture patrons. For instance, the black velvet frame which fre- quently surrounds the screen is found undesirable and a neutral gray is suggested in its place. The reason is simple. Suppose the illumination of the strongest highlight of the picture is 10 foot candles. Under these conditions the brightness of the black velvet frame would be found to be about 0.001 foot-candles. This makes the ratio of the t^vo or the brightness contrast equal to 1 to 10,000. This con- trast is beyond the power of the eye to record and results again in overtaxing the process of adaptation. By using a material with a higher reflecting power than black velvet, the contrast between the screen and the frame may be brought within the range of the eye. If the brightness of the frame is raised to 0.02 foot-candles, the contrast between the strongest highlight in the picture and the frame is 1 to 500. Scientists say that this is about the limit of contrast which the eye can endure with comfort. In general, there- fore, the black velvet frame should not be used but, in its place, a material which has a reflecting power sufficient to raise the apparent brightness of the frame to something like 0.02 foot-candles. The selection of the material will depend upon a num- ber of factors: the illumination of the theater and the dis- tance of the screen behind the front of the stage being the principal ones. For experimental purposes in the labora- tor\- it was found that covering the black frame with white mill net was quite satisfactor>\ Such an expedient will not in general be found satisfacton*- in practice since this material will undoubtedly fail to harmonize with the elegance and richness of finish frequently found in the modern motion picture theater. In many cases the screen area is surrounded by drapings of silk, velvet, or other fabrics and in such cases it is suggested that a fabric harmonizing with the