Pamphlets. Anatomy

Pamphlets. Anatomy

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1887 edition. Excerpt: ... packed that it is difficult to distinguish the cell boundaries. Chromic acid, one-fifth per cent. for three or four days, contracts the cells and gives preparations in which the boundaries and general arrangement of the retinophorae are easily studied. 1 Edited by C. O. Whitman, Ph.D., Milwaukee, Wisconsin. "Dr. Wm. Patten, Mitth. a. d. Zool. Station z. Neapel, vi. p. 733, 1886. Sections of the Eye.--In order to obtain the best sections of the adult eye with all the parts in the most natural position, it is necessary to treat them first with one-tenth per cent. of chromic acid for half an hour, then in one-twentieth per cent. for twenty-four hours; one-tenth per cent. for twenty-four hours, and finally one-fifth per cent. for forty-eight hours or more. Next to this' method, it appears that solutions of sulphuric acid (twenty drops to fifty grammes of water) give the best preparations (for sectioning), of everything except the rods. The double layer of the sclerotica and the fibres penetrating it can be seen in sections of eyes treated twenty-four hours in one-fifth per cent. chromic acid. Maceration and Dissection.--The pigmented epithelial cells of Pectens' eyes and the cells of the cornea are easily isolated by treatment with Muller's fluid or bichromate of potash one-half per cent. for two or three days. For the maceration of all other elements weak chromic or sulphuric acid is used. For the outer ganglionic cells, which are very difficult to isolate, maceration in one-fiftieth per cent. chromic acid gives excellent results, after previously fixing the tissue in one-fifth per cent. for a few minutes. For the retinophorce, one-twentieth per cent. for four or five days proves very useful. Sulphuric acid, five drops to thirty grammes of...show more

Product details

  • Paperback | 36 pages
  • 189 x 246 x 2mm | 82g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236526864
  • 9781236526861