382 Intelligence mid Miscellaneous Articles. 



cold water ; but if it be added to boiling water, it decomposes in- 

 stantaneously, and the water contains pure soda only. 



The author is of opinion that he has stated an important fact, 

 which is, that the same oxide, by combining with different propor- 

 tions of water, can form two acids which are distinguished by their 

 properties, their equivalent, and their mode of combining with bases. 

 — Journ. de Pharm. et de Ch., Mars 1847. 



ON SULPHOXIPHOSVINIC ACID AND ITS COMPOUNDS. 

 BY M. CLOEZ. 



The author remarks that he and M. Bouyet had described a new 

 kind of salts, the acid of which they designated sulphoxiarsenic acid, 

 consisting of arsenic, oxygen and sulphur, water being deducted. 

 The sulphoxiarseniate of potash, which was obtained by passing sul- 

 phuretted hydrogen into a solution of arseniate of potash, has for its 

 formula AsO^ S-. K0-I-2H0. 



The great analogy existing between the corresponding compounds 

 of arsenic and pliosphorus, rendered it probable that sulphoxiphos- 

 pliates might also be formed. After many trials, IM. Cloez succeeded 

 in producing these saltsby decomposing the chlorosulphuret of phos- 

 phorus of Serullas by an alkaline solution. 



The chlorosulphuret of phosphorus, treated with common alcohol, 

 yields an acid analogous to the phosphovinic acid of M. Pelouze, 

 According to M. Cloez the formula of this acid is PhO' S^, C-* H=0, 

 2(H0) ; it is the sulphoxiphosphovinic acid. With pyroxylic spirit 

 sulphoxiphosphomethylic acid is formed. Amylic alcohol should 

 produce the corresponding compound, sulphoxipliosphamylic acid. 



By saturating the sulphoxiphosphovinic acid with the carbonate 

 of barytes, lime, strontia, &c., well-defined crystalline salts are pro- 

 duced : the formula of the bary tic salt is PhO^ S'^ C^ H'^ O, 2BaO + Aq. 



The potash and soda salts are readily obtained by decomposing 

 the chlorosulphuret of phosphorus with an alcoholic solution of pot- 

 ash or soda. These salts are soluble in alcohol. The following 

 equation explains the reaction which occurs with potash : Ph Cl^ S- 

 -fC^H6 0'^-f5(KO) = PhOsS-, C*Hi0 2(KO) + 3(KCl)+HO.— 

 Comptes Rendus, Mars 8, 1847. 



ON ANHYDROUS HYDIIOFLUORIC ACID. 



M. Louyet states that in 1846 he mentioned to the Academj- that, 

 in his opinion, anhydrous hydrofluoric acid was as yet unknown ; in 

 proof of its correctness, he showed that the acid supposed to be so, 

 saturated a smaller quantity of a base than it ought to do, if it had 

 been anhydrous. 



This proof not having satisfied M. Dumas, the author was advised 

 by him to pass hydrofluoric acid, hitherto regarded as anhydrous, 

 over anhydrous phosphoric acid, and to collect the product in a 

 platina vessel immersed in a freezing mixture. According to M. 

 Dumas, if by tliis process a liquid hydrofluoric acid was always ob- 



