British homoeopathic pharmacopoeia.

Date:
1882
Catalogue details

Licence: Public Domain Mark

Credit: British homoeopathic pharmacopoeia. Source: Wellcome Collection.

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    density of 0*920, and contains about 49 per cent, by weight of absolute alcohol. 3. Spirit of 20^ O.P. (over proof).—This is made by mixing 6 measures of rectified spirit with 2 measures of distilled water, the contraction resulting from the mixture of the two liquids being made good in the manner directed under “ Proof Spirit.” It should have a density of 0*8939, and contains about 61 per cent, by weight of absolute alcohol. 4. Spirit of 40° O.P. (over proof).—This is made by mixing 7 measures of rectified spirit with 1 measure of distilled water, the contraction being made good as directed under Proof Spirit.” It should have a density of 0*8646, and contains about 73 per cent, by weight of absolute alcohol. 5. Rectified Spirit (= 60^ over proof) has, as before stated, a density of 0*8298, and contains about 87 per cent, by weight of absolute alcohol. 6. Absolute Alcohol, having a density of about 0*795, is required for a few of the preparations, and may be obtained from rectified spirit in the following manner:— Put the carbonate of potash and spirit into a stoppered bottle, and allow them to remain in contact for two days, frequently shaking the bottle. Expose the slaked lime to a red heat in a covered crucible for half an hour, then remove it from the fire, and, when it has cooled, imme- diately put the lime into a flask or retort, and add to it the spirit from which the denser aqueous solution of carbonate of potash, which will have formed a distinct Take of Rectified Spirit Carbonate of Potash Slaked Lime 1 pint. 1^- ounce. 10 ounces.
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