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

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Ceratum Cantharidis, P. L. Ι 87.

rahe of Spermaceti Cerate, Six drachm S. Blistering Flies, in very sine pOW

vΗaving sos tened the cerate by heat, addiise illos, and mix them togethor.

Unguentum cerussae acetatae, P. L. II8I.

I alio of Superacetate of Lead poWdered,

Dissolve the ivax in se vela fluido unces ofoli, then gradu atly adit thereto the SuperuCC-tate os lead, separately rubbed down With theremaining oil, and stir the mixture With uWooden Stice, tantii the whole has uni ted.

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Ccratum lithargyri acetati compositum, P. L. 178I.

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CERATES. 363

CERATUM RESIN I .

Ceratum resinae flavae, P. L. II 8 T. Ceratum citruaum, P. L. 1745.

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s64 CERATES.

This article is of late introduction, sor the purpose of heeping up a discliarge frona blistered furfaces. It was firStdescribed by Mr. Crowther Observations on V De S elling, 179 I), and has since been received into extensive Use, be- cause it cloes not produce the inconveniences that follow the constant application of the common blistering cerate. Athicla white layer fornas datly upon the part whicli requiresto be removed, that the cerate may be applied immediatelyto the sursace frona Whicli the discliarge is to be made. Italso Sometimes produces great irritation in iis fuit strength, and requires to 5e loWered by Some mild oiniment.

CERATUM SAPONIS.

Ceratum Saponis, P. L. 1787.

Olive Oil, a Pint.

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THE usual consistence of Oiniments is about that of butier.

Unguentum Spermaceti, P. L. I 787. Linimentum album, P. L. 1765.

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Unguentum elemi compositum, P. L. 178 I. Unguentum egumini elemi, P. L. II15. Unguentum e gummi elemi sive Litiimentum Arcaei, P. L. 172O.

UNGUENTUM HYDRARGYRI FORTIUS.

Unguentum hydrargyri fortius, P. L. 178I. Unguentum caeruleum fortius, P. L. 1745.

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Firsi rub the mercury With the suet anil aliti te of the lard, untii the globules dis applar ;then adii the remainder of the lard, and miX.

The labour whicli attends the preparation here directedi,as not been overtooked by the college; and ali the modesby whicti that labour is somelimes diminished have been con sidered, and tried iri various ways. These it is not necessaryto enumerate, hut the result has been a determination to abide by the established form.

Unguentum hydrargyri mitius, P. L. I87. Unguentum caeruleum mitius, P. L. II45.

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NII RATIS.

Unguentum hydrargyri nitrati, P. L. II8I.

In iis consistence this Oiniment mill be soster than theformer of the fame name, by the substitution os olive od fora portion of the lard. Some practitioners have stronglurecommended the use of buiter for the fame purpose.

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Having meited together the wax and lard, add thereto the nitrio oxyd of merculta, in very fine poWder, and mix.

UNGUENTUM HYDRARGYRI PRAECIPITATI ALBI.

Unguentum calcis hydrargyri alba, P. L. I 87. Unguentume mercurio praecipitato albo, P. L. II45.

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Having mel ted the lard Over a flos spe, adii the precipitaled mercury and mi X.

Unguentum Cantharidis, P. L. II87. Unguentum ad vesi atom, P. L. 1745.

Distilled Water, eight fluid-

Resin Cerate, eight OUn COS. Boii the water With the hiistering 1lies tohulf iis quantity, and Strain. Mix the Cerate in to the stru ined liquor, und evaporate it to a

Unguentum basilicum nigrum vel tetrapharmacum, P. L. II 65