Advice medical, and economical, relative to the purchase and consumption of tea, coffee, and chocolate; wines, and malt liquors: including tests to detect adulteration. Also remarks on water. With directions to purify it for domestic use / by J. Stevenson.

  • Stevenson, J.
Date:
1830
Catalogue details

Licence: Public Domain Mark

Credit: Advice medical, and economical, relative to the purchase and consumption of tea, coffee, and chocolate; wines, and malt liquors: including tests to detect adulteration. Also remarks on water. With directions to purify it for domestic use / by J. Stevenson. Source: Wellcome Collection.

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    ( mS) tain substances mixed with it, these sub- stances act, either by their anti-putrescent powers, or by mechanically absorbing the pu- trified particles. Vitriolic acid possesses the first of these properties; and powdered char- coal fills the second intention, in a very strik- ing manner; and the effect of the latter is much more speedy by using it in conjunction with the former. Powdered charcoal prevents the water from acquiring that yellow colour which it usually contracts by time; and the acid particularly contributes to clarify the wa- ter, which the charcoal when employed alone renders turbid. If we wish to use the water thus preserved, it should be first tried by pass- ing a small quantity of it through a strainer in the form of a jelly bag, filled with powder of charcoal; sucha strainer or bag should always be in readiness. Directions to Purify any quantity of Corrupted Water. To the quantity of water intended to be pu- rified, add as much powdered charcoal as may be necessary to entirely deprive it of its bad smell; and, in order to ascertain that the quan- tity is sufficient to clarify the said water, a small