Chemical and Pharmaceutical Manipulations

Chemical and Pharmaceutical Manipulations

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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. 1857 edition. Excerpt: ...of the canal, allows the use of receivers of from two to three inches in diameter. When this cavity is not in use and the mercury required to fill it is needed in the other part of the trough, it is closed with an exactly fitting iron plug which accompanies the vessel for this purpose. The trough is placed upon the operating-table, and is manipulated with in the same manner as the water trough. For the convenience of supporting tubes in a vertical position, there is an accompanying clamp with Flg-315, sliding rod, which is at tached to the side. The small mercurial trough of porcelain, Figs. 315, 317, very useful in organic analysis, contains usually from ten to twelve pounds, and serves also very conveniently for experiments upon a small scale. Smaller sizes, of about four pounds capacity, are made after the pattern, Fig. 316. Fig. 318 exhibits a cylindrical glass trough, which is used with tubes in organic analysis. It is of glass, fifteen and a half inches high, and is widened at the top. The drawing represents the introduction of lye into a graduated tube by means Fig. 316. of the pipette, Fig. 319, over a column of mercury. The tip of the pipette is curved so as to facilitate its entrance under the mouth of the tube. This plan is adopted sometimes in lieu of that given at p. 353, for the separation of two gases, by presenting to both a third substance for which either of them has an affinity. Griffin's trough, which is designed for working with long tubes and the least possible quantity of mercury, has the form of the annexed drawings, the lower one of which presents a sectional view. Fie 320. It has a permanent bee-hive shelf a a for supporting tubes in the act of being filled with gas, and a space, which allows liquids to be passed in more

Product details

  • Paperback | 196 pages
  • 189 x 246 x 11mm | 358g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123661335X
  • 9781236613356