EXPERIMENT XV.

I rubbed three drachms of Aleppo galls reduced to powder, with four

ounces of filtered rain water, for fifteen minutes, and then passed

the solution through paper. It was very styptic to the taste, and was

nearly of the same colour as Huxham's tincture of bark. The residuum in

the filter was unchanged in colour. The bottle containing the liquor

was marked number 1.

Experiments and Observations on the Following Subjects 1. On the preparation, calcination, and medicinal uses of Magnesia Alba. 2. On the solvent qualities of calcined Magnesia. 3. On the variety in the solvent powers of quick-lime, when used in different quantities. 4. On various absorbents, as promoting or retarding putrefaction. 5. On the comparative antiseptic powers of vegetable infusions prepared with lime, &c. 6. On the sweetening properties of fixed air. · 第 64 / 93 题