International photographer (Jan-Dec 1935)

April, 1935 T h INTERNATIONAL PHOTOGRAPHER Twenty-nim THE SPEED (Continued f Gale regarding the point source illustration (Fig. 441, p. 392), whether or not the Hame has ceased to function. If it is true that the whole flame functions, then is it not true that each surface molecule on the surface at double distance is one-fourth as bright because the light pencil which converges upon it has only one-fourth the volume or solid angle that it has when the flame is at the closer distance? This is the truth that Flammarion taught for the sun and what the Rumford photometer teaches for flames. It IS, in my way of thinking, THE BASIC TRUTH OF LIGHT INTENSITY. This truth which is essential for education in the schools, has been hidden behind the point source theory for nearly four hundred years. Using the point source theory, Millikan and Gale annihilate the flame while Melson and Lawrence annihilate the lens apertures. The popular ignorance of light and the haphazard way that photography is practiced should not surprise anyone. OF LENSES rorn Page 20) Bausch & Lomb and all lens and camera manufacturers would be greatly benefited if light were taught in the schools so that lens properties would be understood by the students. In fact, with the true fundamentals of light intensity taught in the schools no special or extra studies of lenses and of surface brightness would be required, since they would be understood from the study of the true basic principles of intensity. It is a strange stand for these gentlemen to take, to uphold the point source theory, when it is the sole reason for the fact that photograph} is not scientifically practiced, nor lenses understood. We should expurgate the point source theory from the physics books and substitute the true quantum or quantity theory, so that students will be able to learn of the functioning of whole natural light sources and come to a knowledge of using light with precision in photography and elsewhere. HIGH SPEED CAMERA Owing tf) the interest which has been developed among scientific groups by the amazing results produced by the Western Electric High Speed Camera Timer, Mr. George Lane of Audio Productions, Inc., was invited to demonstrate the equipment and its results before a regular meeting of the local section of the American Society of Mechanical Engineers. The meeting took place on February 26th at the Engineers Building, 29 West 39th Street, and was arranged through the courtesy of Mr. R. B. Purdy. The entire meeting was given over to the Ultra Speed Camera which Mr. Lane personally demonstrated, following which he showed the group, numbering approximately 125, a demonstration reel of the manner in which this new instrument, which has been called a microscope for time, is used in aiding mechanical industry. By means of the Camera Timer Mr. Lane has already been able to detect mechanical flaws in rapidly moving equipment that had defied any previous method of determining the trouble. "ONCE UPON A TIME" The Metropolitan Life Insurance Company has published in sheet form the song hit of the three-color Technicolor cartoon, "Once Upon a Time." The music has been placed in this form for the special purpose of bringing home this story of safety to the schools. The music was written by Edwin Ludig, Music Director of Audia Productions, from which company emanated the cartoon production in the first instance. J *\ Well Pay Cash! \ WE WANT IMMEDIATELY Mitchell Eyemo De Brie Akeley Bell Cr Howell Contax Leica, and Similar Used Cameras — Also — LENSES, MOTORS, PARTS, AND CAMERA ACCESSORIES What Have You To Offer? Write or Wire Today MOTION PICTURE CAMERA SUPPLY, INC. 723 7th Avenue New York City >■ ROY DAVIDGE FILM LABORATORIES ••• An Exclusive "Daily" Laboratory ••• Quality and Service 6701-6715 SANTA MONICA BOULEVARD GRanite 3108 Please mention The International Photographer when corresponding with advertisers.