. A text-book of bacteriology, including the etiology and prevention of infective diseases and a short account of yeasts, and moulds, haematazoa, and psorosperms. Bacteriology. 16 BACTERIOLOGY. movements on the surface of solid nutrient gelatine. Groups of rods may be observed to pass each other in opposite directions. Single individuals meet and progress side by side, or one or more individuals may part from a group and glide away independently. Occasionally a number of rods progress in single file. It is, however, difficult to believe that these movements can occur on a solid Fig.
. A text-book of bacteriology, including the etiology and prevention of infective diseases and a short account of yeasts, and moulds, haematazoa, and psorosperms. Bacteriology. 16 BACTERIOLOGY. movements on the surface of solid nutrient gelatine. Groups of rods may be observed to pass each other in opposite directions. Single individuals meet and progress side by side, or one or more individuals may part from a group and glide away independently. Occasionally a number of rods progress in single file. It is, however, difficult to believe that these movements can occur on a solid Fig. 3.—Flagella. 1. Coccus with flagellum. 2. Similar coccus dividing, with two flagella. 3. Colony of flagellated macrococci of Beggiatoa roseo-persicina. 4. Short rod from the same Beggiatoa with flagella [all after Zopfj. 6. Bacillus with flagella [from a photograph by Koch]. 6. Bacillus subtilis [after Brefeld]. 7, 8. Short rod- forms of Beggiatoa roseo-persicina with one flagellum [after Zopf]. 9. Very long rod of the same, with flagellum at both ends [after Warming]. 10. Vibrio, with double flagellum at each end [after Warming]. 11. Vibrio, with flagella [from a photograph by the author]. 12. Spirillum with flagella [from a photo- graph by Koch]. 13. Spirillum with flagella [after Zopf]. 14. Spirillum with double flagella [after Zopf]. 15. Beggiatoa roseo-persicina, with a triple flagellum at one end ; and 16, with a double flagellum at both ends [after Warming]. The author is inclined to beheve that there is an almost inappreciable layer of liquid on the surface of the gelatine, which is expressed after the gelatine sets. In tubes of nutrient agar-agar gelatinised obliquely and then kept upright the liquid so expressed collects at the bottom of the sloping 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 origi
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherphila, bookyear1897
