Text Book Of Structural And Physiological Botany Tr And Ed By A W Bennett By I W Thome And A W Bennett

Text-book of structural and physiological botany, tr. and ed. by A.W. Bennett. By I.W. Thomé and A.W. Bennett

Text-Book of Structural and Physiological Botany, Tr. and Ed. by A.W. Bennett. by I.W. Thome and A.W. Bennett

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Text-Book of Structural and Physiological Botany, Tr. and Ed. by A. W. Bennett. by I. W. Thomé and A. W. Bennett

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1885 edition. Excerpt: ...spontaneous power of motion. The Protomycetes are reproduced by cell-division (gemmation) or free cellformation. They are divided into two well-marked families: --The Schizomycetes, or Bacteriaceae, are extremely minute unicellular organisms, occurring in enormous quantities in all organic solutions where decay is going on, of which process they are the invariable accompaniment, if not tire cause. The number of distinct forms that have been described as belonging to the Schizomycetes is very large; but to what extent these are different conditions of development of the same organism is still in doubt. They may be conveniently arranged under the following heads, viz.: --1. Micrococcus. Globular and extremely minute. 2. Bacterium. Short straight rods. 3. Bacillus. Longer straight rods. 4. Vibrio. Curved rods. 5. Leptothrix. Straight filaments. 6. Spirillum. Curved filaments. 7. Zooglcea. Colonies of globular cells imbedded in mucilage. The rods and filaments are characterised by the ease with which they break up into Fig. 380.--Bacteria: separate segments as soon as they come Y "?& . into contact with the atmosphere, from TjUlcinus "uum, which circumstance the class has received d Kibrio Ru&ula, e the same, divid lts name. They multiply in this way, by ing: / spirillum simple division; but in the case of Bacillus, the formation of endogenous spores has also been observed. All the forms except Micrococcus and Zooglcea are endowed with rapid vibratory morions by means of cilia attached to the extremities, which can only be made out by the highest powers of the microscope, and with the assistance of staining reagents. The Schizomycetes usually grow in water, splitting up the nitrogenous compounds which are...