. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. 42 DISEASES OF CROPS. aim, because it was discovered upon Allium cepa. It grows tolerably well in sterilized nutrient agar-agar (Japanese isinglass), and other cultivating media used by scientists. Upon the surfaces of nutrient media, JB. alia produces a bright-green pellicle, and causes certain chemical changes to occur in albuminous substances. The microbe is chromogenic; , it produces a pigment (of a green colour), by the decomposition of the medium upon which it
. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. 42 DISEASES OF CROPS. aim, because it was discovered upon Allium cepa. It grows tolerably well in sterilized nutrient agar-agar (Japanese isinglass), and other cultivating media used by scientists. Upon the surfaces of nutrient media, JB. alia produces a bright-green pellicle, and causes certain chemical changes to occur in albuminous substances. The microbe is chromogenic; , it produces a pigment (of a green colour), by the decomposition of the medium upon which it Fig. 16.—PniKEFACTiTE Bacteeicm or Onions {Bacterium allii). A. The Bacterinm under the high powers of the microscope, u. Jjactcmim alln growing on nutrient agar-agar. It appears that the whole function of this organism is to decompose or disintegrate albuminous substances, giving rise to certain products; viz., sulphuretted hydro^ gen gas (in small quantities), and a deliquescent alkaloid of the following symbolic formula, Cjq H^„ N. Bacterium allii is possessed of great tenacity of life, for after an exposure to 32'' C. (dry heat) for six months the organism had not lost its vitality. Cold appears to. 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 Griffiths, A. B. (Arthur Bower), 1859-. London : G. Bell
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Keywords: ., bookauthorgriffith, bookcentury1800, bookdecade1890, bookyear1890
