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84 C. N. BATSEL AND L. T. SACHTLEBEN [J. S. M. P. E. system focused directly upon the emulsion in the obverse position. With Kodacolor film the emulsion was in the reverse position, making it necessary to refocus the recording system before a recording could be made. The original test recording was made on August 9, 1932. The sound record was very successful, and definitely demonstrated the feasibility of recording sound on this film by the variable-width process, with the emulsion in the reverse position. It was found that no distortion of a serious nature occurred due to the use of Kodacolor film with longitudinal lenticulations. Pursuant to the successful recording of sound on Kodacolor film in the single-film, 16-mm. sound camera, it was believed that sub- tractive color subjects on 35-mm. film should be optically reducible to 16-mm. film by the Kodacolor process, using an optical system similar to that employed in Kodacolor photography with the 16-mm. camera. The first test was made in a crude way using a projector fitted with a two-inch Kodacolor projection lens as a camera. The projector was mounted in a light-tight box and focused on a white card, upon which was projected an image of a frame from a 35-mm. Technicolor print. A strip of raw Kodacolor film was placed in the projector, exposed and reversed, with the result that a fairly promis- ing image was obtained when the film was reprojected. Following this, an optical-reduction step-printer was equipped with the necessary optics to permit printing directly from a 35-mm. Technicolor film to 16-mm. Kodacolor film. This optical system was essentially the one used in Kodacolor projection, with a three- color filter in front of the printing lens, and a negative lens at the 16- mm. film to produce a virtual image of the filter of the proper size at the proper distance from the film. The first system was im- provised from such optics as were available in the laboratory, and the pictures obtained exhibited marked color dominants at the margins, due to the insufficient speed of the printing lens and the consequently diminished size of the filter image. Nevertheless, the results were re- markably promising. Later, a lens of sufficient speed was obtained to permit the required 3:1 ratio between the distance from the film to the filter image, and the total width of the filter image; with the result that a great improvement was effected in the color-balance, and the color dominants at the edges of the picture were practically eliminated. The sound track of the 35-mm. Technicolor print was transferred to the 16-mm. Kodacolor film by continuous optical reduction printing, with the 16-mm. emulsion in the obverse position.