Copy 2

A treatise on poisons, in relation to medical jurisprudence, physiology, and the practice of physic / [Sir Robert Christison].

  • Robert Christison
Date:
1832
Catalogue details

Licence: Public Domain Mark

Credit: A treatise on poisons, in relation to medical jurisprudence, physiology, and the practice of physic / [Sir Robert Christison]. Source: Wellcome Collection.

    854/862 page 824
    [ 824] DESCRIPTION OF THE PLATE. Apparatus for the distillation of fluids suspected to contain. acids, one= — seventh the natural size. figure is of the natural size. The ball may be blown larger, if the material to be reduced is bulky. without soiling its inside. funnel must be a little longer than the emerging tube. The fluid should not be at any time much higher than in the figure, in order to secure the operator against its effervescing up into the emerging tube. The figure is a third of the natural size. bottle capable of standing the fire—half-filled with water, which may — be boiled on occasion,—and having its cork pierced with a small tube drawn at its outer end to a very fine bore. The breath is impelled into the bottle, and, the bottle being then reversed, a very fine stream tus is the invention, I believe, of Berzelius. process, p. 330. over precipitates. Some have a rectangular bend in the upper part, by means of which the operator sees better the point of the instru- ment when in action; but such pipettes are very difficult to clean. That represented in the figure is easily cleaned with a feather. drogen. A, the vessel with zine and diluted sulphuric acid, the lat« ter of which may be renewed by the funnel B. C, a ball on the emerging tube to prevent the liquid thrown up by the effervescence. from passing forward. D, E, corks by which C and G are fitted into F, the tube which contains the sulphuret at F. G, the exit-tube for the sulphuretted-hydrogen, playing into a vessel containing acetate of lead. When the hydrogen has passed long enough to expel all the air, the spirit-lamp flame is applied at F.; and when sulphuretted- hydrogen is formed, the lead solution is blackened. The figure is one- third the size of the apparatus. wa. EDINBURGH: ; PRINTED BY JOHN STARK, / Old Assembly Close. ‘ f
    digitised image 1
    digitised image 2
    digitised image 3