3. (Ph. D.) Litharge plaster, 8 oz.; Burgundy pitch, 2 oz.; peroxide of iron, in fine powder, 1 oz.; as No. 1. Same as B. P.
4. (Wholesale.) From lead plaster (quite dry), 84 lbs.; powdered yellow resin, 14 lbs.; ‘crocus martis’ (lively coloured), 14 lbs.; olive oil, 3 pints; as No. 2.
5. (B. P.) Add hydrated peroxide of iron in fine powder, 1 oz., to Burgundy pitch, 2 oz., and litharge plaster, 8 oz., previously melted together, and stir the mixture constantly till it stiffens on cooling.
Obs. Iron plaster is reputed strengthening and stimulant. It is employed as a mechanical support in muscular relaxation, weakness of the joints, &c., especially by public dancers. Its tonic action is probably wholly imaginary. No. 4 is the ‘EMPLASTRUM ROBORANS’ of the shops at the present time.
Plaster, Oxycro′ceum. Syn. Emplastrum oxycroceum, L. Prep. 1. (Ph. E. 1744.) Beeswax, 1 lb.; black pitch and strained galbanum, of each 1⁄2 lb.; melt, and add of Venice turpentine, powdered myrrh, and olibanum, of each 3 oz.; powdered saffron, 2 oz.
2. (Wholesale.) From black pitch, 9 lbs.; black resin, 11 lbs.; beeswax and lard, of each 21⁄2 lbs.; melted together. Warm; discutient. Still popular with the lower orders. The saffron of the original formula never finds its way into the oxycroceum plaster of the druggists.
Plaster, Palm. Syn. Emplastrum diapalmum, L.; Diapalme, Emplâtre diapalme, Fr. Prep. (P. Cod.) Lead plaster, 32 parts; yellow wax, 2 parts; melt them together, add of sulphate of zinc, 1 part, dissolve in a little water, and continue the heat, with constant agitation, until all the water is evaporated.
Obs. This plaster originally contained palm oil, and this ingredient is still ordered in the formulæ of Plenck and Reuss. Soubeiran directs white wax to be employed.
Plaster, Paracelsus’s. Syn. Emplastrum Paracelsi, E. stypticum, L. Prep. From lead plaster, 28 lbs.; galbanum plaster, 2 lbs.; powdered white canella and gum thus, of each 11⁄2 lb.; melted together. The original formula, as well as that of the Ph. L. 1721 were similar, although much more complicated.
Plaster of Pitch. Syn. Poor man’s plaster, Gout p., Anti-rheumatic p.; Emplastrum pauperis, E. antirheumaticum, E. antarthriticum, E. picis commune, L. This has been already noticed under the head of Resin Paper. It is also, but less frequently, spread on cloth and leather.