(jQ 31 ATE AMD QUANTITY OF SPIRIT JN FER*1EKTED LIQUORS* 



this purpose, 50 grs of transparent crystallized green sul- 

 phate of iron were dissolved in water, and treated with car- 

 bonate Of ammonia as long as any precipitate appeared. 

 This precipitate, after being carefully separated, edulco- 

 rated, dried, and ultimately heated to redness with wax in a 

 platina crucible, weighed exactly 14 grs. It appeared in 

 the form of a red brown magnetic powder*. 

 Proportion of 6. Since therefore 50 grs of crystallized green sulphate 



sulphate of of j 14 stb of this oxide, the 7'2 crs of oxide ob- 



irou in the wa- . • ° ■ « 



te# tained from 50 grs of residue, would represent 25*7 grs of 



green sulphate of iron ; and 11 '59 grs of oxide (which is the 



quantity contained in an English pint of the water), would 



tepresent 41*4 grs of that salt. 



(To be concluded in our next.) 



X. 



Experiments to ascertain the State in which Spirit exists in 



fermented Liquors : with a Table exhibiting the relative 



Proportion of pure Alcohol contained in several Kinds of 



Wine and some other Liquors. By William Thomas 



Brande, Esq. F. R. S.f 



Sect. I. JIT has been a commonly received opinion, that 

 the alcohol obtained by the distillation of wine does not 

 exist ready formed in the liquor: but that it is principally a 

 product of the operation, arising out of a new arrangement 

 of its ultimate elements. 

 Principal Tne proofs which have been brought forward in support 



of this theory are chiefly founded on the researches of 



.'roof. 



* This result, which was obtained in two different trials, with the 

 variation of only 0*1 gr. corresponds exactly with the proportions given 

 by Mr. Kirwan, in his Treatise on Mineral Waters (table iv.), in 

 which 28 »rs are the quantity of oxide istated to exist in 100 grs of 

 green sulphate. But, in order to establish the perfect coincidence 6f 

 these results, 11 would be necessary to know the process which Mr 

 Kirwan followed. The iron in his experiment is stated to have been 

 obtained in the state of black oxide. 



f Phil. Trans, "for 1811, p. ;C~. 



tfabronj 



