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After the reading of the paper Mr. Campe announced that Mr. Patterson of The National Cash Register Company would address the members.
A discussion followed the reading of the paper participated in by Mr. B. M. Johnson, Mr. P. R. Bassett, Mr. C. A. B. Halvorson, Dr. Mott, Dr. W. E. Storey, Mr. C. F. Jenkins and Mr. W. E. Kunzman.
Mr. Farley in charge of the lecture department of the National Cash Register Company, addressed the members and explained the multitudinous use of motion pictures in connection with the sale of cash registers.
Slides and pictures were shown and diagrams were traced upon ground glass and projected. The address proved extremely interesting and gave the members an idea of the commercial application of pictures as employed in the work of the N. C. R.
A paper was presented by Mr. F. W. Hockstetter entitled "A New Process of Taking Motion Pictures on Opaque Paper Film" and "Method of Illumination Excluding Thermal Rays."
Mr. Hockstetter announced that he was unable to give a demonstration but those interested should visit his laboratories and see the apparatus referred to in operation.
Mr. Manheimer desired to know the capacity of the magazines in connection with the camera spoken of in Mr. Hockstetter's paper.
Mr. Hockstetter said that the camera would be able to take from one to two hundred feet and the projector from two hundred to five hundred feet.
Mr. Hockstetter did not offer substantial proof of his statements but said that he would be able to do so at a later date when his patent would permit him to do so.
Many members expressed admiration for the work while others were skeptical as to the correct data and questioned the possibility of excluding thermal rays by the methods advanced.
Report of Optics Committee.
"Effect of Color on Motion Pictures" and "Absorption and Reflection Losses in Motion Picture Objectives," presented by Dr. Storey.
Mr. Victor desired to know whether, in Dr. Storey's opinion, the variation of opinions was not based upon color blindness frequently encountered in the eyes of people.
Dr. Storey did not think that the variations of opinion were due to color blindness.
Mr. Porter said that owing to the difficulty of determining the effect on different people it would be impossible to establish a standard for practical purposes.
He further said that, in his estimation, the work of the Optics Committee in dealing with the subject had been carried as far as possible; that the data so far obtained should be printed in the
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