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In preparing the previous edition of this book, Dr. Todd, who since then has passed on, found it necessary to request the help of an associate. Dr. Sanford has carried forward the work under the same general plan. The book is primarily a textbook for students, but the requirements of the laboratory have also been met. Several obsolete laboratory methods have been omitted and new procedures have been added. These include Clark and Collip's method of determination of calcium; the technic of the Keith, Rowntree and Geraghty method of determining blood and plasma volume; Corper and Uyei's method of cultivating the bacillus of tuberculosis; Fairhall's method for the determination of lead; Folin's recent method for the precipitation of protein from body fluids; his modified method of determining uric acid in the blood, and his revised copper solution for the determination of blood sugar. There is a discussion of the Aschheim-Zondek
Clinical Diagnosis by Laboratory Methods: A Working Manual of Clinical Pathology.. JAMA. 1931;97(6):415. doi:10.1001/jama.1931.02730060053047