398; Intelligence and Miscellaneous Articles. 



thus obtained, ■\vliich is washed, and then redissolved in water con- 

 taining sulphuric acid. This solution is to be treated with animal 

 charcoal ; carbonate of soda added, precipitated a dirty yellow sub- 

 stance, which is to be dried, pulverized, and frequently digested In 

 aether. By this operation a nearly colourless solution is procured, 

 which by the distillation of the aether leaves the cissampelin ; in 

 order to purify this substance completely it is to be dissolved in di- 

 lute acetic acid, and the solution when diluted and moderately heat- 

 ed is to be again precipitated by carbonate of soda, and the precipi- 

 tate carefully washed and dried. 



M. Feneulle had previously examined this root, and had noticed 

 the existence of a yellow bitter substance in it, which was probably 

 impure cissampelin. — Journal de Pharmacie, Jan. 1839. 



ANALYSIS OF CRYSTALLIZED OLIGOCLAS * FROM ARENDAL OR 

 SODA-SPODUMENE. BY ROBERT HAGEN IN THE LABORA- 

 TORY OF H. ROSE. 



Soda 9,37 



Potash 2,19 



Lime 2,44 



Magnesia 0,77 



Alumina 23,09 



Silica 63,81 



101,37 



Poggendorff' s Annalen, vol. 44. p. 329. 



ACTION OF ACIDS ON IODIDE OF SODIUM. BY JUSTUS LIEBIG. 

 M.Preuss has described in the 26th vol. of the Annales de Pharmacie, 

 a pecxiliar property of iodide of sodium obtained by dissolving Iodine 

 in a solution of soda, evaporation and calcination. The fused mass, 

 after solution in water, yielded crystals, which were more difficultly 

 soluble than iodide of sodium, and the solution Immediately gave a 

 precipitate of iodine on the addition of hydrochloric and sulphuric 

 acid ; this property Is possessed by iodide of sodium only when 

 treated with certain oxacids, as nitric acid, &c., and then In a much 

 smaller degree. 



This property is explained by the circumstance, that If lodate of 

 soda be calcined, either with or without excess of alkali, this salt 

 allows iodine to separate In the latter case, and is decomposed into 

 oxygen, and a compound first noticed by M. Magnus. It may be 

 considered as a basic hypolodlte of soda 1-0 + 2 Na O ; is not de- 

 composed a heat below whiteness, and is by water converted into 

 iodide of sodium and lodate of soda. 



The crystals which M. Preuss obtained from the fused mass, are 

 formed of a double compound of lodate of soda and iodide of sodium. 

 By the addition of an acid to the solution, the sodium of the iodide 



* We have seen several specimens in this country ticketed oligoclas, not 

 one of which bore any resemblance to soda-spodumene, but were apparently 

 green cleavelandite. — Edit. 



