The Illustrated Annual of Microscopy

The Illustrated Annual of Microscopy

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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. 1898 edition. Excerpt: ...has been impossible to touch more than the extreme fringe of the subject, which to treat in detail would occupy not one but several large volumes. My leading idea has been to stimulate persons desirous of doing some microscopic work, and in doubt as to what branch to choose, to select this most fascinating study, and to leave them, not satiated, but rather like Oliver Twist, "asking for more" information. HE exhibition of Polyzoa, I-Iydrozoa, Rotifers, Crustacea, etc., has always I been a matter of difficulty, and the following details of a method which avoids the constant need of watch.ing to prevent evaporation, etc., may be found of interest. The animals are mounted in a hanging drop of water on the under side of the cover glass, luted on to a cell of paraffined millboard. In this condition I have preserved Lophopus and other Polyzoa for forty-eight hours, including two nights' exhibition. The following details may be found useful. The cell is composed of a piece of millboard about 2" 1"; in this a circular hole, "--+" in diameter, is punched by a wad-punch, as sold by the gunsmiths. The cell is then immersed in a bath of melted paraffin candle, so long as bubbles rise; it is then placed on a. glass slide, about 4" 2," and left to cool; the side of the cell which bears the burr from the punch must, of course, be uppermost, or else it will not lie flat and stick to the slide; a number of these may be prepared at the same time, as they keep for years, and travel very well. VVhen the time comes the cover-glass is laid on a flat surface, and the weed bearing the objects is placed on it; a needle may be used to arrange, if necessary; or the drop of water containing swimming organisms is...show more

Product details

  • Paperback | 76 pages
  • 189 x 246 x 4mm | 154g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236757858
  • 9781236757852