Abstract
THE research laboratory of the Eastman Kodak Co. has in preparation a series of monographs on the theory of photography. The time is ripe for the presentation in a connected sequence of the work done and the results obtained, for these are very numerous and very scattered. The present volume is the first issued, and presumably may be regarded as a sample of those that are to follow. The company, the laboratory, and the authors are to be congratulated in that they have made so good a beginning. The authors have been engaged for some years in the practical study of the subject with which they deal, and they give some results that have not been pub lished before. A study of the relations that exist between the sizes of the grains and their photographic properties is reserved for a future monograph, though it is by no means neglected in the present treatise. The first half of the volume deals with the influence of ammonia on photographic emulsions and a theory of ripening; von Weimarn's theory and the determina tion of the dispersity of silver bromide precipitates; accessory factors influencing the dispersity of silver bromide emulsions; crystallisation catalysis; and capillarity and crystalline growth. The intimate relation between grain structure and photographic properties is, however, fundamentally a matter of crystallographic investigation, and the remainder of the volume is devpted to this matter in five chapters. The authors state that “when the experimental con ditions regulating the three primary factors, (1) dispersity-distribution, (2) recrystallisation, and (3) sorption (both adsorption and desorption), are completely known, scientific control of the characteristic curve—i.e. of speed, latitude, and density—will be possible.” The book is copiously illustrated and well indexed; it has many summaries, all necessary references, and an extensive bibliography.
The Silver Bromide Grain of Photographic Emulsions.
By A. P. H. Trivelli S. E. Sheppard. (Monographs on the Theory of Photography from the Research Laboratory of the Eastman Kodak Co.) Pp. 143. (New York: D. Van Nostrand Co.; London: Kodak, Ltd., 1921.) 15s.
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J., C. The Silver Bromide Grain of Photographic Emulsions . Nature 109, 304 (1922). https://doi.org/10.1038/109304b0
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DOI: https://doi.org/10.1038/109304b0