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March 22, 1924

The Determination of Hydrogen Ions. An Elementary Treatise on the Hydrogen Electrode, Indicator and Supplementary Methods. With an Indexed Bibliography on Applications.

Author Affiliations

By W. Mansfield Clark, M.A., Ph.D., Professor of Chemistry, Hygienic Laboratory, United States Public Health Service. Second edition. Cloth. Price, $5. Pp. 480, with 42 illustrations. Baltimore: Williams & Wilkins Company, 1923.

JAMA. 1924;82(12):995. doi:10.1001/jama.1924.02650380063040

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The first edition of this book was a pioneer in that realm of science in which physics, chemistry and the biologic sciences find common ground; namely, the theories and practices of hydrogen ion concentration. It was to be expected, therefore, that Clark's work, even with the imperfections characteristic of all pioneer contributions, would find a ready reception. Such has been the case so that the second edition is available in a relatively short time for such a painstaking work. As was pointed out in the previous review (The Journal, April 23, 1921, p. 1190), the contents of the book are still presented in a manner too difficult to be of ready reference to the average physician. It is gratifying, however, to note that some of The Journal's former criticisms do not apply to the second edition. For instance, the author's directions as to the details of depositing platinum black

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