Gum resins. 157 



this a second and third time ; mix the liquors and expose them 

 to the air in a broad vessel, tor two days, then strain through 

 linen, and evaporate. 



HoM berg's pdrified opium. Baume's purified opium. Ex- 

 tract all the part that is soluble, by repeated decoction of 41b. 

 in three or four gallons of water, until no more is taken up ; then 

 mix all these decoctions, evaporate to one gallon and a half, and 

 keep boiling for two, three, or even six months, adding fresh water 

 from time to time: strain the decoction and evaporate to the con- 

 sistence for making pills. 



Cornette''s purified opium. Separate the resin by redis- 

 solving the common extract in water, strain the solution, and 

 again reduce it by evaporation to an extract ; repeat this process 

 several times. 



Josse''s purified opium. Work opium under water, to 

 separate the glutino-resinous part which remains in the hand: 

 filter the water and evaporate to an extract. It still contains some 

 resin, but is much less disagreeable in its smell, and considerably 

 improved as an antispasmodic. 



Accarie"'s purified opium. Digest opium with charcoal 

 powder in water for some days; strain the liquor, clarify with 

 whites of Qg^^ and evaporate in a water-bath to an extract. Very 

 mild in its effects, like the former. 



Powel''s purified opium. Boil opium in water, as long as 

 any thing is taken up by it ; then digest the residuum in spirit of 

 wine, mix the two solutions, and evaporate them to a proper con- 

 sistence. 



East Indian opium. In round masses; black, smooth, like 

 an extract, totally soluble in water, and the solution is precipi- 

 tated by acetate of barytes, by which the solution of Turkey 

 ropium is not altered ; and more copiously by oxalic acid ; it also 

 leaves no glutinous residuum on solution; is considered weaker 

 than that of Turkey. 



English opium, Opium Am/Ucum. Has the same extract-like 

 appearance as the East Indian ; light-coloured, but is said to be 

 equal if not superior in quality to the Turkish : Buckingham- 

 shire. 



Wild cumin opium. Yielded by the Hypccoum procnmbens 

 md H. pendulum ; narcotic, and similar to opium. 



CiiERRis. From Cannabis jeea, most powerfully n.inoin-. 



MoMEA. The gum chcrris purified. 



Gu.M OPOPANAXy Opopamu:, Pfistiiiacoi opopanacis gummi" 

 resiua. Exudes from mcisions made in the roots of Pastinaca 



