A 



JOURNAL 



OF 



NATURAL PHILOSOPHY, CHEMISTRY, 



AND 



THE ARTS. 



SUPPLEMENT TO VOL. XXL 



ARTICLE I. 



Essay on the Composition of Alcohol and of Sulphuric Ether. 

 By Theodore de Saussure. 



(Concluded from p. 273.) 



Decomposition of Sulphuric Ether, 



Sect. VI. Preparation of the Sulphuric Ether employed 

 in my Experiments. Considerations on the Analysis of 

 this Fluid. 



l\ HUNDRED parts of sulphuric acid by weight, mixed Preparation of 

 with a hundred parts of spirit of wine of the shops, the'^'^^ 

 specific gravity of which was 0'842 at IG'* of Reaumur 

 [68° F;], afforded me by distillation through a worm 53 

 parts of ether not rectified, the specific gravity of which 

 was 0-797. 



This ethereous liquor, after mixing it with an alcoholic Rectified. 

 solution of potash, was distilled nearly to half at a tem- 

 perature of 35° R. [111° F.]. The ether, freed from 

 the sulphurous acid, oil, and a part of the alcohol which 

 were united with it, was of the specific gravity of 740* at 

 10° R. Ids'" F.]. This is the rectified ether of the shops. 



Vol. XXL— Supplement. Y The 



