An essay on culinary poisons : containing cautions relative to the use of laurel-leaves, hemlock, mushrooms, copper-vessels, earthern jars, &c. with observations on the adulteration of bread and flour, and the nature and properties of water.

Date:
1781
Catalogue details

Licence: Public Domain Mark

Credit: An essay on culinary poisons : containing cautions relative to the use of laurel-leaves, hemlock, mushrooms, copper-vessels, earthern jars, &c. with observations on the adulteration of bread and flour, and the nature and properties of water. Source: Wellcome Collection.

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

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    pretended experience of the effects of certain ftony waters in breeding the (tone, may, upon the bell authorities, be rejected as falfe*. The beft way of determing the hardnefs or fofenefs of water, is by fcraping any certain quan- tity of foap into it, and obferving how it diffblves or lathers. If water be perfectly fbft, the foap will diflblve quickly, uniformly, and without curdling ; and, upon making the glafs brifkly* will raife a ftrong froth or lather at the top. But the fmalleft degree of hardnefs will ftiew itfelf, either by the foap not diflblving fo readily, by its turning curdly and uneven, or by lefs froth re- maining after it is agitated; and the different de- grees of hardnefs may hereby be very well deter- mined. The beft way of making this trial is with a fmall quantity of Caftile foap, viz. about a grain to an ounce of water. RAIN-WATER. In fummer-time rain-water brings along with, it the feeds and embryos of vegetables and ani- malcula, t Medical Tranf. by the Coll. of Phyf. vol. I. p 7.