. Pathogenic microörganisms; a practical manual for students, physicians, and health officers . l marked in young, vigor-ous cultures. Here they have diagnostic value. At least some ofthese granules are nuclear in character. Certain other granules which take up stains readily, and others stillwhich absorb stains with difficulty, are of the nature of starch of fator of other food products. Meyer has described some as being composedof volutin, a protein characterized by insolubility in alcohol and solu-bility in water, acids and alkalis. Certain saprophytic forms havesulphvu, others iron granul
. Pathogenic microörganisms; a practical manual for students, physicians, and health officers . l marked in young, vigor-ous cultures. Here they have diagnostic value. At least some ofthese granules are nuclear in character. Certain other granules which take up stains readily, and others stillwhich absorb stains with difficulty, are of the nature of starch of fator of other food products. Meyer has described some as being composedof volutin, a protein characterized by insolubility in alcohol and solu-bility in water, acids and alkalis. Certain saprophytic forms havesulphvu, others iron granules. Organs of Motility.—^The outer surface of spherical bacteria is almostalways smooth and devoid of appendages; but that of the rods andspirals is frequently provided with fine, hair-like appendages, orflagella,which are organs of motility (Plate III, Figs. 18-21). These flagella,either singly or in tufts, are sometimes distributed over the entire bodyof the cell, or they may appear only at one or both ends of the polar flagella appear on the bacteria shortly before division. The.
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