340 



ON ACETIC ACID AND ACBTATES. 



Sanidin. 

 Desmin. 



Characters of 

 the spinellane. 



1, A rariety of tabular feldspar, which he calls sanidin ; 



% Another substance, crystallized in small silky tufts, 

 which he calls desmin. 



The spinellane has a brownish colour. 



Its form appears to be that of a hexacdral prism, ter- 

 minated by triedral pyramids with rhomboidal faces. 



Mr. Nose however imagines, that he has observed a great 

 many points of resemblance between it and the balass ruby, 

 or spinelle, whence he has been led to give it the name of 

 spinellane. 



It does not rank very high in point of hardness, but is 

 sufficiently hard to scratch glass. 



Saturating 

 power of the 

 solution of 

 potash ascer- 

 tained. 



Separation of 

 the spirituous 

 liquor by car* N 

 bouate ef 

 potash. 



III. 



Researches on Acetic Acid, and some Acetates : jBz/Richahd 

 Cheneyix, Esq. F.R. S. M. R. I. A. Sfc. 



(Concluded from p. 2370 



J. O ascertain the saturating power of this solution of 

 potash however, I neutralized with it muriatic acid diluted 

 so as to be of the specific gravity of 1-0707. Of this 

 10-000 parts required 27*448 of solution of potash. I then 

 precipitated an equal quantity of the same acid by nitrate 

 of silver, and I obtained 5-050 of muriate of silver, which 

 gives us a fixed standard for the solution of potash, and 

 renders the experiments capable of being compared together, 

 and with others. The specific gravity of the solution of 

 potash was 1-0786. 



Carbonate of potash thrown into a fluid containing a 

 spirituous liquor is divided into two portions : but if the 

 fluid contain acetic acid also, or, I believe, any other acid, 

 that forms with the potash a salt soluble in spirit, the sepa- 

 ration does not- take place: particularly if the acid con. 

 tained in it be much more in quantity than the spirituous 

 liquor- For this reason I have been forced to distil the 

 fluid products of acetates of silver, copper, and nickel, 

 from potash, till all their acid was extracted, and examine 

 them afterward for the spirituous liquor. 



Ijn- 



