sm 



Distilled. 



Products. 



Coai. 



Aifics cnm- 

 pJetdy dis- 

 solved in a 

 large c)iiantity 

 cf cold >.vaier. 



ANALYSIS OF ALOES. 



much more easily pulvcrable in winter than in summer. If 

 a piece be held in the flame of a candle, it melts, swells up^ 

 and takes fire. 



§ II. Fifty grammes [772 grs.] being distilled with a heat 

 very gentle at first and incapable of decomposing the aloes, 

 the products were: 



1st, 8 gram, [123*5 grs.] of water, impregnated with the 

 essential oil from which the smell is derived. 



2d, at a higher degree of heat came over 8*7 gram. 

 [134 grs.] of a nearly colourless water, in which I found 

 some acetic acid, but no ammonia, on adding quicklime in 

 powder. 



3rd, 5 gram. [77-2 grs,] of a heavy red oil, soluble in 

 alcohol. 



4th, a large quantity of oily hidrogen gas and carbonic 

 acid. 



5th, there remained in the retort, which had experienced 

 a commencement of fusion, 20 gram. [308*8 grs.] of a 

 hard coal, very bulky and swelled up, retaining a large 

 quantity of hidrogen, which was seen to burn on exposing 

 it a long time to a strong heat in a crucible for the purpose 

 of incinerating it, which was found to be impossible. It 

 retained all its blackness, its brilliancy, and considerable 

 hardness; yet it had lost 12*5 gram, [193 grs.] of its 

 weight, which I ascribed in great part to hidrogen. The 

 7*5 gram. [115*8 grs.] that remained contained no sensible 

 quantity of potash. 



Having treated this coal Avilh muriatic acid, the fdtercd 

 liquor was precipitated by ammonia, which separated some 

 oxide of iron, and a small quantity of phosphate of lime. 

 Carbonate of potash precipitated a few decigrammes of 

 carbonate of lime. 



On heating nitric acid on this coal a small quantity of 

 tannin is obtained, which precipitates glue. 



§ III. Powdered aloes, triturated in a glass mortar with 

 cold water, yielded a substance having the tenacity of tur- 

 pentine when worked between the hands. I obtained a 

 complete solution by successive additions of water, but it 

 required a large quantity. The last portion, that remain- 

 ed to be dissolved, was similar to the first in its bitterness and 

 other properties. This solution froths when shaken. 



148 gram. 



