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. 1878 edition. Excerpt: ... be desirable. Thus, injection of ammonia into the veins has been found useful by Halford and others in cases of snake bites. We must also endeavour to promote the elimination of the poison from the body by exciting the secreting functions. VII.--DETECTION OF POISONS. Notice the smell, colour, and general ...
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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. 1878 edition. Excerpt: ... be desirable. Thus, injection of ammonia into the veins has been found useful by Halford and others in cases of snake bites. We must also endeavour to promote the elimination of the poison from the body by exciting the secreting functions. VII.--DETECTION OF POISONS. Notice the smell, colour, and general appearance of the matter submitted for examination. The odour may show the presence of prussic acid, alcohol, opium, or phosphorus. The colour may indicate salts of copper, cantharides, &c. Seeds of plants may be found. This examination having been made, the contents of the alimentary canal, and any other substances to be examined, must be submitted to chemical processes. They are generally mixed, though the pure substance may sometimes be submitted to the analyst. Simple filtration will sometimes suffice to separate the required substance; in other cases dialysis will T)e necessary, in order that crystalloid substances may be separated from colloid bodies. In the case of volatile substances distillation will be required. For the separation of an alkaloid the following is the process of Stas: --1. Treat the organic matter with twice its weight of absolute alcohol, to which from ten to thirty grains of tartaric or oxalic acid has been added, and subject to a gentle heat. 2. The residue, after filtration and drying, is dissolved in a small quantity of distilled water, treated with bicarbonate of soda, and the alkaloid set free. 3. The resulting liquid, holding the alkaloid in solution or suspension, is mixed with four or five times its bulk of ether, chloroform, or benzole, briskly shaken, and left to rest. The ether floats on the surface, holding the alkaloid in solution. 4. A part of this ethereal solution is poured into a watch-glass and allowed..
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