An essay on culinary poisons. Containing cautions relative to the use of laurel-leaves, hemlock, mushrooms, copper vessels, earthen jars, etc. With observations on the adulteration of bread and flour, and the nature and properties of water / [J. Robertson].

  • Joseph Robertson
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, earthen jars, etc. With observations on the adulteration of bread and flour, and the nature and properties of water / [J. Robertson]. Source: Wellcome Collection.

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    <c A friend of mine, fays the Doctor, in . this town [Newcadle] has a cidern for colledting rain water, fo condru&ed, that it both allows the water to fubfide, and the upper pare of it to run through a bed offand, which is raifed by a parti¬ tion above the bottom of the cidern; by which means the water becomes perfectly clear and bright, and is preferred by mod who have faded it, to any other water in this town”. *• i 4. Some have obje&ed, but probably without reafon, to this mode of filtration, on a prefump- tion, that the fand has the fame effect on the wa¬ ter as the filtering done : for it is faid, that the fand is infenfibly diffolved by the water; fo that ' in four or five years it will have lod a fifth part of its weight. M. Amy therefore recommends the filtration of water through a fpunge, more or lefs comprefTed. And this, he allures us, will render it, not only more clear, but more whole- fome, than either a done or fand, 5. As the pured of all water is obtained by didillation, Dr. Heberden recommends this me¬ thod, as particularly ufeful where fuel is cheap F 2 and