Experiments and observations tending to show the composition and properties of urinary concretions / by George Pearson.

  • George Pearson
Date:
[1798?]
Catalogue details

Licence: Public Domain Mark

Credit: Experiments and observations tending to show the composition and properties of urinary concretions / by George Pearson. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    3. Lye of mild potash, or subcarbonate of potash, being dropped into the solution (^, 2.) with its crystallized deposit, the crystals at first seemed to dissolve; but, on standing, a great part of the matter was deposited, and the liquid remained turbid. 4. The precipitate being boiled with lye of carbonate of soda, more seemed to be dissolved than in pure water; but the solution was not clear, and, on evaporating it nearly to dryness, and pouring cold water upon it, on a paper strainer, scarcely any thing but the soda passed through with the water; the precipitate remaining behind on the paper. The result was the same, when this experiment was made with a lye of carbonate of ammoniac. The result was also the same, with water in which red oxide of mercury had been boiled; which was also boiled with this precipitate, and filtrated after cooling. 5. A little of the precipitate being triturated with quick- lime, hot water was poured upon it. The filtrated liquor gave the precipitate back again, on adding muriatic acid. 6. The precipitate exposed to flame, with the blowpipe, turned black, emitted the smell of burning animal matter, and evaporated or burnt away without any signs of fusion; stain- ing the platina spoon black. 7. Five grains of the precipitate, in half an ounce of water, were left to stand in a warm room, during the months of Au- gust and September last, without any signs of putrefaction ap- pearing, or any obvious change taking place. 8. Twenty-four ounces of boiling water were saturated with the precipitate, and divided into six portions; from each of which, on cooling, most of it again precipitated. The first portion, on boiling with a little lye of carbonate of
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