and, when considerably cooled, add of expressed oil of mace, 2 dr.; croton oil, 1 dr.; and spread the mixture upon heart-shaped pieces of white sheep-skin, without remelting it. Stimulant and counter-irritant; recommended by its proprietor as a cure for all human ailments. The ‘Bath-plaster Pills,’ also prepared by Mr Roper, resemble several of the aperient pills already noticed. (See ‘Anat. of Quackery.’)
Plaster, Scott’s. Prep. From lead plaster, 14 oz.; olive oil and white resin, of each 1 oz.; melted together, and spread on calico.
Plaster, Sharp’s Black. Prep. From olive oil, 5 parts; carbonate of lead, 4 parts; beeswax, 1 part; boiled to a plaster.
Plaster, Simple. See Plaster, Wax.
Plaster of Soap. Syn. Emplastrum è sapone, E. saponis (Ph. L. E. & D.), L. Prep. 1. (Ph. L.) To lead plaster, 3 lbs., melted by a slow heat, add of Castile soap, sliced, 1⁄2 lb., resin, 1 oz., both (also) liquefied by heat, and, constantly stirring, evaporate to a proper consistence.
2. (Ph. E.) To litharge plaster, 4 oz., gum plaster, 2 oz., melted together, add of Castile soap, in shavings, 1 oz., and boil a little.
3. (Ph. D.) To litharge plaster, 21⁄2 lbs., melted over a gentle fire, add of Castile soap, in powder, 4 oz., and heat them together (constantly stirring) until they combine.
4. (B. P.) Hard soap (in powder), 6; lead plaster, 36; resin (in powder), 1; to the lead plaster, previously melted, add the soap and the resin, first liquefied, then, constantly stirring, evaporate to a proper consistence.
Obs. Care must be taken to evaporate all the moisture from the above compounds, as, if any is left in the plaster, it turns out crumbly, and does not keep well. Much heat discolours it. (See below.)
Soap plaster is emollient and resolvent, and is used in abrasions and excoriations, and as a dressing to soft corns, lymphatic tumours, &c.