. Bacteria in relation to plant diseases. Bacteria; Plant diseases. -^\^ B J-P Vioo mm 1. Fig. clouded +15 peptonized beef-bouillon in 48 hours and grew well, but not so freely as at room temperature. After 10 days' exposure in the thermostat at this temperature, streaks to slant agar gave only a discrete growth (separate colonies), indicating that the cloudy bouillon was then only thinly occupied by living bacteria. It also lives for a considerable time in peptone-water and in bouillon at 200 to 250 C. This bacterium does not live for many weeks ?Exposed in Feb. 1904 in the thermostat a
. Bacteria in relation to plant diseases. Bacteria; Plant diseases. -^\^ B J-P Vioo mm 1. Fig. clouded +15 peptonized beef-bouillon in 48 hours and grew well, but not so freely as at room temperature. After 10 days' exposure in the thermostat at this temperature, streaks to slant agar gave only a discrete growth (separate colonies), indicating that the cloudy bouillon was then only thinly occupied by living bacteria. It also lives for a considerable time in peptone-water and in bouillon at 200 to 250 C. This bacterium does not live for many weeks ?Exposed in Feb. 1904 in the thermostat at ° C. the Virginia organism clouded peptonized beef-bouillon of the following reactions: +25. +15. °. and refused to cloud —20 bouillon, Dunham's solution, or Uschinsky's solution. The experiment was twice repeated with the same results. fFiG. 109.—(a) Bacterium solanacearum (District of Columbia strain). From a slide (2a) of August 9, 1904. Flagella stained by Lowit's method. (B)Bad. solanacearum (D. C. strain) showing flagella stained by van Ermengem's silver nitrate method. Slide of August 12, 1904. (c) Freehand sketches of flagella from three slides of Bad. solana- cearum, stained in 1896 by van Ermengem's silver nitrate method. Slides X, XX, and XXX (South Carolina organ- ism. No. XXX taken from inoculated Physalis No. 57, the others from cultures). The numbers correspond to the fol- lowing vernier-readings on Zeiss photomicrographic stand 32532 used by the writer: (1) ; (2) +; (3) ; (4) ; (5) 20+X7-2; (6) ; (7) ; (8) 20X5; (9) ; (10) 18X4-4; (") ; (12) ; (13) ; (14) ; (15) 138X5-6 artefact (?); (16) ; (17 and 18) Numerous flagellate rods are visible on slide XXX at and all seem to be one-flagellate, but it requires a high power and a bright light to make them out as all are feebly stained: One might also add, keen eyesight. (d) Co
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