EXPERIMENT VI._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.

The putrid liquor which had been used as a standard in the fourth

experiment, was divided into four parts, one of which was continued

as a standard, to another was added about half a drachm of Magnesia,

and an effervescence was procured by some drops of oil of vitriol.

The offensive smell continued for a few minutes, but was soon much

abated, and at length entirely sweetened. To another portion was added

twenty grains of Magnesia only, this in fifteen minutes had almost

lost its putrid smell, and in two or three hours became quite sweet.

To the fourth was added the same weight of calcined Magnesia, which

almost instantly deprived the liquor of every degree of putridity. The

standard was then mixed with a scruple of crab's eyes, which, for about

a minute, seemed to diminish the foetor, but it then returned as

strongly as ever; whereas the others continued sweet for several days.

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 51 / 93 题