Bulletin Volume 57-65

Bulletin Volume 57-65

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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. 1904 edition. Excerpt: ...between these two shades of brown, but one graded into the other. The inoculated pieces at the end of three days had a decidedly soapy odor and the reaction was alkaline to litmus. The checks remained perfectly sound. Rata cauUflmoer.--A large head of cauliflower that had been three weeks in cold storage was obtained from the market. A portion of the main stalk was thoroughly washed with corrosive sublimate, and then with sterile water. With a sterile knife the outside was pared off and the remaining part was then cut into slices that could be conveniently placed in petri dishes. These were then inoculated with the calla-rot germ from a pure culture in beef broth, leaving a number of pieces for control. The culture used in this case was three days old. In twenty hours at 20 to 24J C. the inoculated pieces began to show a faint discoloration, turning slightly brown. This continued until at the end of about two and a half days the whole of each piece inoculated had become discolored. At this time the inoculated pieces were decidedly alkaline in reaction, gave a very strong odor of decaying vegetable matter, and on comparing with Ridgway's plates the color was found to correspond very closely to the Ecru Drab, No. 21, Plate III, or to Saccardo's Avcllaneus, No. 7, Table I. The control pieces were still health'. In several cases the inoculations did not take. Several branches from the head were sterilized and the lower part was inoculated with the same germ. In all these cases the inoculation was successful, with the same characteristic odor, color, and reaction. Raw radish.--Several red, so-called "white tip,"' round radishes were obtained from the market. These were washed and t lie surfaces sterilized in the same manner as the...show more

Product details

  • Paperback | 152 pages
  • 189 x 246 x 8mm | 286g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236833287
  • 9781236833280