Resinous Extracts. ■■■■■' !'■ ^09 



2 cwt. out of 3 are consumed. — Poix noir, Poix grass". From the 

 dregs of resin and the straw by which it has been strained, run 

 down in a pitch-kiln. 



Yellow rosin, Poix resine^ R. Jlava, It, pvii oleo volatile 

 deprivafum. Obtained b}' boiling or distilling rough turpentine 

 with water, or by boiling or distilling turpentine, and pouring the 

 residuun), while yet fluid, into water, of which it absorbs about 

 l-8th of its weight : suppurative externally, used in ointments 

 and plasters. 



Boiled turpentine, Terchinthina coda, P. L. V. Venice 

 turpentine lib. boiled in '20 pints of water, until as brittle as glass ; 

 made into small cakes, for rubbing fiddle-sticks. 



Brown rosin. Black rodn, Greek pitchy Brai sec. Colophane, 

 Fix Graica, Colophonium^ Bcsin anigra. Obtained by boiling or 

 distilling rough turpentine without water ; suppurative externally. 



RESINOUS EXTRACTS. 



Rosin of calamus aromaticus, Resina calami. 



RosiN OF scAMMONY, ResiucL scammoiiH. 



Rosin of jalap, Resina jalapcs. lOlbs. yielded lib.: not 

 soluble in ether. 



Rosin of guaiacum, Resina gi/aiaci. Dissolves in ether. 



Rosin of turbith, Resina turpetJii. Eight oz. yield 3 v. 



Resina corticis Peruviani. Digest rectified spirit upon 

 the substances repeatedly, till the last portion is not tinged ; distil 

 off the spirit till but a fourth ])art remains, add water to cause the 

 rosin to settle, which is then to be washed and dried. 



ExTRACTUM ciNCHON.E REsiNosuM. Soak 2lbs. bruiscd bark 

 in 4lbs. spirit of wine for four days, filter and distil off the spirit. 



Barky*s resinous extract of bark. Distil tincture of 

 hark, made with rectified spirit, nearly to dryness, remove the 

 rrwin on its surface, and evaporate slowly the remaining liquid to 

 a fine extract. 



Rosin of aloes, Resina aloes. The insoluble residuum left 

 in making washed aloes. 



Opium purificatum molle, P. D. Digest lb. j of sliced 

 opium in lb. xi j of proof spirit ; and after filtration, distil ofl* the 

 spirit till the mass is reduced to a consistence fit for pills. 



Op. pur. durum. Made sufficiently hard to powder. 



Alcoholic extract of nux vomica. Digest rasped nux 

 ra in alcohol lb. j at 40 ({q^. Baunic, in a cool place, strain 

 evaporate to an extract ; if weak alcohol be used, the extract 

 is not so powerful. 



