ift: 



Resinous Extracts. 211 



Sufficient researches have not, however, been yet made, to sanc- 

 tion the introduction of this substance into medicine. 



Emetine. Pour ether at 6*0 deg. 3ij on powdered ipecacu- 

 anha 5J, digest, decant, distil, and repeat this as long as any fatty 

 odorous matter is extracted from the root ; then digest the pow- 

 der in alcohol of 40 deg. 5iv, repeat this three times with fresh 

 alcohol ; distil gently to dryness, dissolve what is left in cold 

 water ; add subcarbonate of magnesia to separate the gallic acid 

 it contains, dissolve again in alcohol, filter, and evaporate to dry- 

 ss; produces 70 or 80 grains. In reddish brown scales, easily 

 nning in the air, not crystallizable ; emetic in doses of a quarter 

 of a grain, or rather more. 



PcRE EMETINE. Digest powdered ipecacuanha first in ether, 

 and then in rectified spirit ; distil off the spirit, and dissolve the 

 remainder in water, add calcined magnesia in sufficient quantity ; 

 pour off the liquor, wash the remainder with a little very cold 

 water to separate the colouring matter, and dry it, digest alcohol 

 on it, filter, distil off the spirit ; dissolve the remainder in diluted 

 acetic acid, clarify the solution by bone black, and add ammonia 

 to throw down the emetine, which is white, scarcely soluble in 

 water ; emetic in doses of a sixteenth of a grain. 



Gen'tiaxixe. Digest gentian root in powder in ether for two 

 days and nights, filter, evaporate nearly to dryness ; add alcohol 

 to the yellow crystalline mass thus obtained until it no longer 

 becomes coloured ; evaporate to dryness, redissolve in weak alco- 

 hol, filter, evaporate again to dryness; dissolve in water, add 

 some calcined magnesia, boil, filter, digest the sediment in ether, 

 and evaporate to dryness. Gentianine is yellow, scarcely soluble 

 in water, very soluble in alcohol or ether; a strong aromatic 

 bitter, in doses of gc. ij ; the tincture is mostly used. 



Glaiadine. Rub fresh-made gluten of wheat flour with 

 alcohol, evaporate to dryness: the glaiadine thus obtained may 

 be purified by extracting the colouring matter by means of sul- 

 phuric ether, which does not dissolve the glaiadine ; used to form 

 a test liquor. 



LupiKiXE, prepared by boiling the liipinus terminis in alcohol 

 of the specific gravitv 936, filtering the solution, and then evapo- 

 rating to dryness. The residuum has a yellowish-green colour, 

 i«ii very solid, and transparent. This is dissolved in water, the 

 Hcolour removed by animal charcoal, the solution evaporated to 

 Hthe consistence of syrup, by which small white crystals are ob- 

 IBtained. The liquid is then evaporated to dryness, the extract 

 lieated anew with boiling alcohol, and again evaporated, and then 

 a bitter principle is obtained to which the name of lupimne has 

 been given. This is a solid substance of a yellowish colour. Its 



