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The second edition of this book, intended primarily for student nurses, has been enlarged by the addition of material concerning the bacteriophage phenomenon, precipitation tests for syphilis, blood grouping and the colorimetric titration of mediums. It is unfortunate that the author did not take the opportunity to correct certain misstatements that appeared in the first edition. A few of the most glaring ones may be noted. 1. Denitrifying bacteria do not "reduce" proteins to nitrates. 2. The Schick test will not detect diphtheria carriers. 3. The pH value should be defined as the logarithm of the reciprocal of the hydrogen ion concentration. 4. The anaerobic culture methods described are not the ones in most common use. 5. Streptococci give a variety of types of hemolysis on blood agar plates—not always a "wide zone." 6. The inulin fermentation test for differentiation of pneumococci and streptococci is not absolute. 7. Bacillus
Principles of Bacteriology.. JAMA. 1924;82(8):651. doi:10.1001/jama.1924.02650340061038