. Agricultural bacteriology; a study of the relation of germ life to the farm, with laboratory experiments for students, microorganisms of soil, fertilizers, sewage, water, dairy products, miscellaneous farm products and of diseases of animals and plants. Bacteriology, Agricultural. GENERAL CHARACTERS OF BACTERIA II them are shown in Fig. 6. The shape and appearance of the colonies produced by different kinds of bacteria are often very different, showing, indeed, greater varieties than can be seen in the bacteria themselves with a microscope. As a result the shape and appearance of these colon
. Agricultural bacteriology; a study of the relation of germ life to the farm, with laboratory experiments for students, microorganisms of soil, fertilizers, sewage, water, dairy products, miscellaneous farm products and of diseases of animals and plants. Bacteriology, Agricultural. GENERAL CHARACTERS OF BACTERIA II them are shown in Fig. 6. The shape and appearance of the colonies produced by different kinds of bacteria are often very different, showing, indeed, greater varieties than can be seen in the bacteria themselves with a microscope. As a result the shape and appearance of these colonies are often used to separate the numerous bacteria from each other and to classify them. A colony, when it comes from the multipHca- tion of a single individual bacterium, is made of one kind of bacteria only. This colony may easily be picked out with a sterile needle, and when properly placed in another culture medium it becomes a pure culture. The starting-point in prac- tical bacteriological study is thus the colony rather than the indi- vidual bacterium (see Laboratory Work). Form of Bacteria.—Bacteria are of three quite different shapes, but are all very simple, (i) Simple spheres (see Fig. 7, a). Such spherical forms are called Cocci In common microscopical preparations no internal structure can be seen, the bacteria appear-. FlG. 6.—Colonies of 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 Conn, H. W. (Herbert William), 1859-; Conn, H. J. (Harold Joel), 1886-1975; Conn, H. W. (Herbert William), 1859- Agricultural bacteriology, a study of the relation of bacteria to agriculture. Philadelphia, P. Blakiston's Son & Co
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbacteriologyagricult
