Optical Instrument Monthly Volume 1

Optical Instrument Monthly Volume 1

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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. 1905 edition. Excerpt: ... of these lakes is at present Professor W0lcott's special field of research. Mr. B. H. Ransom, of the Bureau of Animal Industry, Washington, D. C., spoke, among other things, about Haemogregarines in a snake tick and about a Nematode in horses hitherto unreported in the United States. In discussion occurring at about this point statements were made by some of the persons present that they had known of cases of the existence of trichinae--a parasite whose acquisition implies carnivorous habits--in the bodies of herbivorous animals--specifically the horse and the rabbit. It was admitted that one such instance was due to a forcible overcoming of the vegetarian scruples of the rabbit'--which in the interest of science had been subjected to the treatment of old Eleazar--yet another case was cited in which trichinae had been found in a rabbit which had not undergone such experiment, and regarding horses there were at least two mutually corroboratory accounts. Prof. Charles Brookover, of Akron, Ohio, presented a paper on "The Preservation of Protozoa," and described a certain very successful method for mounting specimens. Prof. B. L. Seawell, of Warrensburg, Mo., gave a description of the apparatus he has devised for taking large samples of water from different depths in con nection with his biological survey of the Pertle Spring Lakes, Missouri. These lakes are a newly formed biological unit oflwhich he is making a systematic examination. The inconclusive nature of quantitative determinations made from small samples, etc., has induced him to construct tube sections about a metre long and of sufficiently large diameter, which are arranged to be mounted end for end and inserted in the lake to different depths, securing...
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Product details

  • Paperback | 64 pages
  • 189 x 246 x 3mm | 132g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236864018
  • 9781236864017