On the analysis of the blood and urine, in health and disease : with directions for the analysis of urinary calculi / by G.O. Rees.

  • George Owen Rees
Date:
1836
Catalogue details

Licence: Public Domain Mark

Credit: On the analysis of the blood and urine, in health and disease : with directions for the analysis of urinary calculi / by G.O. Rees. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    These salts are all reduced to carbonates at a red heat. Citrate of lime is to be distinguished by the following examination: — When boiled with a solution of carbonate of potash, a carbonate of lime is deposited, and the citric acid forms citrate of potash with the alkali present. This alkaline citrate is precipitated by neutral nitrate of lead, and the precipitate collected on a filter. This is known to be citrate of lead from the fact of its being soluble in a solution of caustic ammonia. Tartrate of lime is known from the characteristic odour of tartaric acid which it evolves when subjected to a charring heat; this test distinguishes the tartrates very completely. Malate of lime, like the citrate, forms an alkaline salt when boiled with a solution of carbonate of potash ; but the precipitate in neutral nitrate of lead produced by this solution is distinguished from that formed by the citrate of potash, in not being soluble in ammonia, but being very freely dissolved by boiling water, and crystallizing as the water cools in fine needle-shaped crystals. Diabetes. Dr. Henry has constructed the following table, by which we are enabled to determine the proportion of solid extract contained in any quantity of diabetic urine, ?imply by ascertaining its specific gravity. In the ex- periments which afforded these results a steam bath was used, and the heat continued until the extract ceased to lose weight.
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