718 ELEMENTS OF MATERIA MEDICA.
with a slow fire; then add the Oil , and press the Cerate, while hot*through a linen cloth, L. The Edinburgh College orders of Resin, S'"Axunge, -viij., Rees’ wax, oij. Melt them together with a gentle hea ,and then stir the mixture briskly while it cools and concretes. f 1 ,Dublin College directs of Yellow Wax, lb. j., White Resin, lb. ij-, prep areHogs ’ Lard, lb. iv. Make an ointment, which, while yet hot, should 6strained through a sieve).—A mildly stimulant, digestive, and deterg^application to ulcers which follow burns, or which are of a foul and in" 0lent character, and to blistered surfaces to promote a discharge.
2. Em pi a, strum Resinje, L., Emplastrum Rcsinosum, E., Emplcst^ ul>Lithargyri cum Resina, D.—Has been already described, p. 521.
2. Pice bur gundica, E. D.— Burgundy Pitch.
Pix abietina, L.
non
Preparation. —True Burgundy pitch is prepared by melting conn 11 ^frankincense ( Abietis resina, L., Thus, D.) in hot water, and strain 1 ' 1 ”through a coarse cloth. By this process part of the volatile oil and timpurities are got rid of. The substance sold as Burgundy pit<d) 1 j
"lid
the shops is rarely prepared in this way, but is fictitious. Its prindP
constituent is rosin, rendered opaque by the incorporation of water, - .jcoloured by palm oil. One maker of it informed me that he pvep ;irCit from old and concrete American turpentine. *
Properties. —Genuine Burgundy pitch is hard, brittle when cold, bnreadily taking the form of the vessel in which it is kept. It softens Ethe heat of the hand, and strongly adheres to the skin. Its colon 1 ’ ^yellowish white; its odour is not disagreeable ; its taste slightly bin® gFictitious Burgundy pitch is usually of a fuller yellow colour than 1genuine, and has a somewhat less agreeable odour. . 0 {
Composition. —Consists of resin principally, and a small quantity
volatile oil. . ,
oth ervee !l
Physiological Effects. —Its effects are similar to those of the
terebinthinate resins. In activity it holds an intermediate station bet"common turpentine and rosin, being considerably less active than ^first, and somewhat more so than the last of these substances. L saction is that of a mild irritant. In some persons it excites a trouble-^1.^vesiculo-pustular inflammation (Rayer, Treat, on Diseases of theby Dr. Willis, p. 366). , ]lC r,
Uses. —It is employed as an external agent only, spread on .forming the well-known Burgundy pitch plaster (emplastrum p' lClSgundicce), which is applied to the chest in chronic pulmonary confid 3 ' 1 ^!to the loins in lumbago, to the joints in chronic articular affections,to other parts to relieve local pains of a rheumatic character. If aCa counter-irritant or revulsive. „ foe
Emplastrum Picis, L. E.—Burgundy Pitch, lb. ij.; Resin 01 q x \Spruce Fir, [Thus] lb. i.; Resin ; Wax , of each, jiv. ; Expresseof Nutmeg, 3j.; Olive Oil ; Water, of each, fSij. Add first theof the Spruce Fir, then the Oil of Nutmegs, the Olive Oil , anWater, to the Pitch, Resin, and Wax , melted together. Lastlj, ^ 0 fthem all, and boil down to a proper consistence.— L. The foim"^^the Edinburgh College is as follows:—Burgundy Pitch, lb.iss-> jqj-and Wax, of each, 3ij.; Oil of Mace, jss.; Olive Oil , fSj;