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92 CLASSIFIED INDEX Exchange Practice Report (General), v. 30, no. 6 (June 1938), p. 651. Sensitivity Tests with an Ultra-Speed Negative Film, P. H. Arnold, v. 30, no. 5 (May 1938), p. 541. Grain Size Determination and Other Applications of the Callier Effect, J. Eggert and A. Kuester, v. 30, no. 2 (Feb. 1938), p. 181. Film Perforation and 96-Cycle Frequency Modulation in Sound-Film Records, J. I. Crabtree and W. Herriott, v. 30, no. 1 (Jan. 1938), p. 25. Recording Tests on Some Recent High-Resolution Experimental Emulsions, J. O. Baker, v. 30, no. 1 (Jan. 1938), p. 18. Objective Quantitative Determination of the Graininess of Photographic Emulsions, A. Goetz and W. O. Gould, v. 29, no. 5 (Nov. 1937), p. 510. Mathematical Relations between Grain, Background Noise, and Characteristic Curve of Sound-Film Emulsions, W. J. Albersheim, v. 29, no. 4 (Oct. 1937), p. 417. Standards Report (Film Perforation), v. 29, no. 4 (Oct. 1937), p. 376. Infrared Negative as Applied to Special-Effects Photography, G. W. Hough and W. Leahy, v. 29, no. 3 (Sept. 1937), p. 326. Two New Films for Duplicating Work, C. E. Ives and J. I. Crabtree, v. 29, no. 3 (Sept. 1937), p. 317. Present Aspects in the Development of 16-Mm Sound Film, A. Shapiro, v. 29, no. 3 (Sept. 1937), p. 303. Manufacture of Motion Picture Film, E. K. Carver, v. 28, no. 6 (June 1937), p. 594. New Method for the Dry Hypersensitization of Photographic Emulsions, F. Dersch and H. Diirr, v. 28, no. 2 (Feb. 1937), p. 178. Some Hazardous Properties of Motion Picture Film, A. H. Nuckolls and A. F. Matson, v. 27, no. 6 (Dec. 1936), p. 657. Stability of Motion Picture Films as Determined by Accelerated Aging, J. R. Hill and C. G. Weber, v. 27, no. 6 (Dec. 1936), p. 677. Film Emulsion for Making Direct Duplicates in a Single Step, W. Barth, v. 27, no. 4 (Oct. 1936), p. 419. Physical Tests on Cellulosic Films, and Their Reproducibility, S. E. Sheppard, P. T. Newsome, and S. S. Sweet, v. 27, no. 2 (Aug. 1936), p. 218. Preservation and Storage (See also SMPE Activities) Plan for Preserving 16-Mm Originals of Educational Films, W. H. Offen- hauser, Jr., v. 43, no. 6 (Dec. 1944), p. 418. Physical Properties and Dimensional Behavior of Motion Picture Film, J. M. Calhoun, v. 43, no. 4 (Oct. 1944), p. 227. New Treatment for the Prevention of Film Abrasion and Oil Mottle, R. H. Talbot, v. 36, no. 2 (Feb. 1941), p. 191. Film Preservation Report (Handling, Storage Cabinets, Printers), v. 35, no. 6 (Dec. 1940), p. 584. Regulations of the National Board of Fire Underwriters for the Storage and Handling of Nitrocellulose Motion Picture Film, v. 34, no. 3 (Mar. 1940), p. 311. Preservation of History in the Crypt of Civilization, T. K. Peters, v. 34, no. 2 (Feb. 1940), p. 206.