Congressional Edition Volume 5316
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. 1909 edition. Excerpt: ...of incubation. The most favorable substrata used were potato and bread steamed in distilled water. On potato the growth was unusually rapid, appearing in the form of a luxuriant, furlike, prominently raised growth, covering the potato slant in three or four days. Spore formation was extremely abundant in this medium, the characteristic crescent-shaped segmented spores appearing in enormous numbers about the fifth day after inoculation. After about ten days the entire surface of the potato was completely enveloped in the pure white growth. On bread saturated with distilled water the growth was also very abundant and in five days had covered the surface of the medium. It continued to increase and became wrinkled. In ten days the bread had crumbled and sunk to the bottom of the tube, and the growth, being fully 12 mm. in thickness, floated on the surface of the water, which later assumed a yellowish cast. On bouillon the growth was about the same as on the other liquid substrata. Growth appeared in the depth of the liquid and sent mycelial strands up the sides of the tubes for a distance of 25 mm. above the surface of the medium. The bouillon remained clear and there was no change of color. The fusarium was also grown on acid and neutral gelatin in the form of stab cultures. The tubes were placed in the ice chest, and it grew equally well, but feebly, on the one as the other. The surface of the gelatin became covered with the fungus, and in five days arborescent spurlike growths appeared along the line of the stab in the form of isolated areas about the size of a pea in circumference. After about four weeks the gelatin began to liquefy directly under the surface growths and the liquefied portions assumed a light brown color. Liquefaction, ..
- 189 x 246 x 11mm | 358g
- 13 Sep 2013
- United States
- black & white illustrations