384 Miscellanies. - 



2. Salicine. — On the 6th of December last, Gay-Lussac present- 

 ed to the French Academy of Sciences, six bottles of Salicine, sent 

 to him by M. Leroux, and destined for the six members of the Sec- 

 tion of Medicine. This interesting substance is manufactured by 

 M. Leroux, in large quantity, and it is his wish that its qualities as 

 a febrifuge may be thoroughly tried. — Rev. Encyc. Dec. 1830. 



3. Crystalline compounds in Sulphuric Acid. — Chevreul and 

 Serullas made a report to the Academy on the 27th of December, 

 on the memoirs of Gaultier de Clauhry, relative to the crystalline 

 compound which is formed in the preparation of sulphuric acid. 

 " According to Gaultier, the theory of the formation of sulphuric 

 acid requires some modifications. In his view, the sulphurous acid 

 completely decomposes a portion of hypo-nitric acid, by disengaging 

 azote : the sulphurous acid, transformed into sulphuric acid, unites 

 with the nitrous acid and water, to form, as is well known, crystal- 

 line matter, which being dissolved in water, is converted into sulphu- 

 ric acid, hypo-nitrous acid, and deutoxide of azote. This crystal- 

 line compound includes less water than the hydrate of sulphuric acid, 

 and the denomination of nitrous and hydric sulphate, which Berzelius 

 has given to it, ought to be adopted, as denoting exactly its compo- 

 sition. The numerous experiments of Gaultier require the use of 

 materials difficult to manage, and they can be performed only by 

 dextrous hands. They confirm known principles, — they show a dis- 

 engagement of azote before unobserved, and lead to some changes in 

 the analysis of crystalline matter. — Rid. 



4. A remarkable Chalybeate Water discovered in the course of 

 the last summer, at Vicars Bridge, near Dollar, in Scotland, is de- 

 scribed by Arthur Connel, F.-R. S. E. in Jameson's Journal. Its sp. 

 gr. is 1.04893. Three cubic inches of it weighing about 814 grs., 

 contain 42.651 grs. or more than 5 per cent of solid matter. Sea 

 water contains about 3 per cent, of saline constituents. The con- 

 tents of one gallon of the water are — 



Per-sulphate and proto sulphate of Iron, 3037.84 



Sulphate of alumina, 580.64 



Sulphate of magnesia, 277.20 



Sulphate of Lime, 43.6S 



Common salt and muriate of potash, 2.04 



3941.40 



