Agfa motion picture topics (Apr 1937-June 1940)

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AGFA SUFEEPAN Figs. 2-a 2-e — Graininess records of the same emulsion for different densities. inasmuch it is of almost equal size in la. lb, lc, and is considerably larger in the last two emulsions of known large granularity (average grain size I . The first three emulsions show, in spite of an approximate equal grain size, considerable variations in the size of the fluctuations, i. e. in graininess. Furthermore, it appears that apart from granularity and graininess. each emulsion possesses a rather characteristic shape of an average fluctuation which indicates that in different emulsions the grains group 19