The pharmacopoeia of the Royal College of Physicians of London, MDCCCIX

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Emplastrum ammoniaci cum hydrargyro, P. L. II 8I. Em-Plastrum eX ammoniaco cum mercurio, P. L. 1745.

Sulphura ed Oil, a sui drachm. Rub tho mercury With the sulphurated oli

untii the globules dis appear; then adit by

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Emplastrum cerae, P. L. 1787. Emplastrum attrahens, Ρ. L. 1745. Emplastrum de meliloto simplex, P. L. 172O.

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Emplastrum lithargyri compositum, P. L. 1787. Emplastrum commune cum gummi, Ρ. L. 17 5. Diachylon magnum cum gummi, P. L. 1720.

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351 PLASTERS.

EMPLASTRUM HYDRARGYRI

MERCURIAL PLASTER.

Emplastrum lithargyri cum hydrargyro, P. L. 1787. Emplastrum Commune cum mercurio, P. L. 1745. Emplastrum mercuriale, P. L. 172O. ' .

The Use of a sinali proportiora os sulphurated oti diminishes the labour whicli is requisite for the extinction of themer ry, and in the preparation os a plaster any diminutionos est ect consequent thereiapon need not be looked to, Witti So much care, as in other instances.

Emplastrum cantharidis, P. L. 1787. Emplastrum Vestoatorium, P. L. IT45.

Tu ke of Elis tering Fly in very sine po der,

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Πaxing mel ted the plaster and lard toge ther, anil removed them frona the sire, justhei ore they beCome soliti, sprint te in thebl istering flies, and mi X the whole together.

This biistering plaster Will be someWhat foster than theformer, and will spread eastly without requiring the use of an heated iron spatula, whicli is used too hol is osten Mundio diministi iis effeci, and ought there re to be omitted altogether.

As optum produces someWhat, though a smaller degree, of iis specifc effect When applied externalty, and as a plaster of this fori is osten required by practitioners, it has been thought right to introduce it.

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EMPLASI RUM PICIS COMPOSITUM

Emplastrum picis burgundicae, P. L. I 787. Emplastrum cephalicum, P. L. II45. P. L. II20.

Εmplastrum lithargyri, P. L. II87. Emplastrum conamune, P. L. 17 5. Diachylon simplex, P. L. I 20.

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Stantly stiri ing, untii the oti anil oxyd of lo ad unite in to the Consisten Ce os a plaster. Butit will be pro per to a id a littio more bot ling uiter, is the water Whi h Was employed in the beginning Shail be ne arly ConSU med hos ore the end of the proCOSS.

This plaster Was originalty called Emplastrum diachion, but then iis form Was more complicated. Iis preparation is of great importance, as it forms the basis, by additions to hich so many other plasters are prepared. The water is necessary to moderate the heat, and prevent the oti frona burning and growing blach, and is more Water be required it must be ad ted botling, or it mill be api to By abolat. Constant stirring is also necessary to preVent the mass DomsNelling suddenly and running over the fides of the vesset.

EMPLASTRUM RESINAE.

Emplastrum lithargyri cum resina, P. L. II 87. Emplastrum commune adhaesivum, P. L. 1I45. D. L. II 2 O.

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EMPLASTRUM SAPONIS.

Emplastrum Saponis, P. L. II 87. Emplastrum e Sapono, P. L. 1745. P. L. 172O.

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CERATA.

CERATES

Ceratum lapidis calaminaris, P. L. I 787. Ceratum epuloticum, P. L. II 5.

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A composition of this hind was tirst introduced and long

used under the name of Turner s Cerate.