^$2 ANA1.TSI8 OF ETJPHORBIUM. 



Art. III. Analysis of Euphorhium. 



EupboTbium Sect. 1. The Dutch have their euphorbiutn from Mala- 



'?nts^'^^^^"' bar, where it flows from the euphorbia antiquorum ; that 



used in England is from the euphorbia cunariensi«*, whirh 



furnishes the euphorbium used in France, as Mr. Braconnot 



had an opportunity of satisfying himself, by finding several 



branches of the tree among the specimens he examined. 



Actionofheat 5*^0/. II. Euphorbium, when exposed to a gentle heat, 



*" **• softens easily, and loses a twentieth of its weight in moisture. 



Boiled in wa- I boiled 4 gram. [6l*8 grs] in 100 gram. [1544 grs] of dis- 



^^^' tilled water. The filtered liquor left an insoluble substance. 



Properties of which, when dried, weighed 3 gram. [46'3 grs.]. What 



the passed through was of an amber colour, and had a bitter 



taste with a slight degree of acrimony, 

 folmion. This solution reddened infusion of litmus. Oxalate of 



potash threw down from it a pretty copious precipitate of 

 oxalate of linie. Nitrate of lead formed in it a white pre- 

 cipitate entirely soluble in distilled vinegar. Lime-water 

 rendered it turbid, and occasioned a yellow precipitate, 



which vinegar dissolved. 

 Boiled in alco- Sect, III. A. I boiled 20 gram. [308*f5 i^rs] of euphorbium 

 '***• in 90 gram. [1389*6 grs] of alcohol at 36* [spec. grav. 0-837], 



which was sufficient to dissolve all the parts capable of so-» 

 lution. This solution filtered at a boiling heat left a sub- 

 stance on the filter, which, after being well washed with 

 alcohol and dried, weighed 6*4 gram. [98*8 grs.] 

 Deposit from B. Haviug mixed together the alcoholic solutions, which 

 Iuftdin'*^°* ^" ^'^^ ^^^"^^ turbid on cooling, and let them stand at rest 

 for two days, a considerable quantity of a white, granular, 

 and somewhat gelatinous substance was deposited, which, 

 being washed with alcohol a«d dried, weighed 47 gram. 

 [72*5 grs]. It still retained some alcohol, which being 

 driven off by heat, only 3*4 gram, [52*6 grs] remained, 

 similar to wax. This substance was seraitransparent, capable of being in- 

 dented by a hard body, softened readily between the fingers, 

 was almost wholly volitalized on a redhot iron, and com- 



* According to our college, who have readmitted it into their Jast Phar- 

 ^acQj:opiay from the euphorbia officinarvm. C. 



ported 



