20-i Miscellaneous Intelligence. 



M. Sementini* is nothing- more than a mixture of chloride of iodine 

 and iodine. When saturated with carbonate of soda, the iodine in 

 sohition is precipitated, and on evaporating the solution to dryness, 

 and heating" it strongly, the residue fuses, and by proper tests is 

 found to be a mixture of chloride and iodide of sodium. 



These statements apply only to the iodous acid : as to the oxide 

 of iodine, no source of chlorine exists in the process last described 

 by M. Sementini. ^ ^ ^ •' 



9. On Maiiganesic Acid, hy M# Unverdorben. — When manga- 

 nesate of potash is distilled with a little anhydrous sulphuric acid, 

 manganesic acid is evolved in the form of a red transparent gas, 

 which dissolves in water, forming a red solution. The gas fre- 

 quently decomposes spontaneously in the retort, with explosion, 

 producing oxide of manganese and oxygen. 



Manganesate of potash was analysed by distilling it with excess 

 of sulphuric acid, collecting the oxygen disengaged, and estimating 

 the proportion of protoxide of manganese and salts of potash re- 

 maining in the retort. According to these experiments the acid 

 consistsof Manganese . 58.74 



Oxygen .41.26 



...iHip'^iiU i.; i^5 100.00 



And the mangajiesate of potash of Or being calcined 



Potash . . 25.63 . . 32.75 



Manganese acid . 52.44 . , 67.25 



Water , . 21.93 



100.00 



100.00 



Ann, des Mines, 1827, p. 145. 



10. Heavy Muriatic Ether, and Hydrocarhuret of Chlorine or 

 Chloric Ether. — Some comparative experiments have been made on 

 these two substances by M. Vogel. He prepared the former of 

 them by passing chlorine gas into alcohol. The muriatic acid was 

 then separated by distilling the fluid from off chalk, in which opera- 

 tion the muriatic ether and alcohol passed over together, and these 

 were divided by the addition of water, which dissolved the latter, 

 and left the former. The chloric ether was made as usual from 

 chlorine and olefiant gases. The results that were obtained by 

 acting on these substances by a high temperature, potash, phos- 

 phorus, &c., induced M. Vogel to consider them as identical in 

 composition, notwithstanding some differences in their physical 

 properties ; the specific gravity of the muriatic ether was 1.134, 

 that of the chloric ether 1.214, and the odour of the latter is more 

 aromatic, and the taste more sweet than of the former. 



Whilst passing the chlorine into the alcohol, M. Vogel observed 



* See the last volume of this Journal, p. 477. 



