Science Bulletin Volume 8-9

Science Bulletin Volume 8-9

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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. 1914 edition. Excerpt: ... to keep alive in a wet pack of cloth or snow for several hours. Our first experiment with that was on February 15, 1912, when I packed some Simulium larvae, on the rocks, in wet snow wrapped in cheese cloth. The time of packing was 5 P. M., the place Rosedale, Kan. From there I transported the mass in an old suitcase to Lawrence and placed them in a ripple in the laboratory at 8 P. M. The snow pack was frozen when I unpacked the larvae, but they were active and continued to live afterward in the laboratory. The next time we tried that experiment was June 7, 1912, when I packed the larva and pupae on rocks in wet cheese cloth at Rosedale at 5 P. M., brought them to Lawrence and placed them in the laboratory ripple alive at 11 P. M. Some of the larvae left in the wet cloth were still alive at 10 A. M. the next day, June 8. This made a total of seventeen hours that the larvae kept alive in the wet pack. The pupae continued to live, so that imagoes emerged June 14. The larva: soon transformed to pupae, and twenty-four flies emerged June 19. Again on August 3, 1912, I brought to Lawrence from Rosedale several pupae torn from the rocks and several larvae off the rocks in a wet pack in a tin box. Those larva: lived through that ordeal all right, and two flies emerged from the pupa August 4. However, at this time the Lawrence city water was so impure that they were using strong chemicals to purify it. This seemed to kill the larva, so that they were all gone from the ripple August 5. No more flies emerged from the pupae. Larva newly hatched from the eggs in the laboratory ripple soon died. On July 2, I placed Simulium eggs in the laboratory ripple, and on the 5th and 7th I found newly hatched larva, but the city water seemed to kill them after...show more

Product details

  • Paperback | 234 pages
  • 189 x 246 x 12mm | 426g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236757939
  • 9781236757937