. Bacteriology in medicine and surgery. A practical manual for physicians, health officers, and students. Bacteriology. 552 BAOTEBIOLOGY. reaction be not decidedly acid, which arrests develop- ment. It grows in cow-dung and in more or less contaminated earth. It is also capable of leading a saprophytic existence. The bacillus is non-motile. Growth in Gelatin. In gelatin plate cultures, at the end of twenty-four to thirty-six hours at 24° C, small, white, opaque colonies are developed, which Fig. Colonies of bacillus anthiacls upon gelatin plates, o, at the end of twenty- four hours; 6, at
. Bacteriology in medicine and surgery. A practical manual for physicians, health officers, and students. Bacteriology. 552 BAOTEBIOLOGY. reaction be not decidedly acid, which arrests develop- ment. It grows in cow-dung and in more or less contaminated earth. It is also capable of leading a saprophytic existence. The bacillus is non-motile. Growth in Gelatin. In gelatin plate cultures, at the end of twenty-four to thirty-six hours at 24° C, small, white, opaque colonies are developed, which Fig. Colonies of bacillus anthiacls upon gelatin plates, o, at the end of twenty- four hours; 6, at the end of forty-eight hours. X 80. (F. FLtJGQE.) under a low-power lens are seen to be dark gray in the centre and surrounded by a greenish, irregular border, made up of wavy filaments. As the colony develops on the surface of the gelatin these wavy filaments spread out, until finally the entire colony consists of a light gray, tangled mass, which has been likened to a Medusa head (Fig. 73). At the same time the gelatin begins to liquefy, and the colony is soon surrounded by the liquefied medium,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Park, William Hallock, 1863-1939; Guerard, Arthur Rose, 1851-. New York and Philadelphia, Lea Brothers & Co
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