Intelligence and Miscellaneous Articles, I5t 



It appears therefore that hordein differs very materially from this sub- 

 stance as well as from saw-dust, of which the analysis is thus given 

 by MM. Gay-Lussac and Thenard : 



Carbon 52* 



Oxygen 42*4 



Hydrogen 5*6 



100- 

 M. Marcet therefore considers hordein a peculiar substance, but 

 most resembling starch. The azote which it contains may, he thinks, 

 be derived from the presence of gluten. 



The following are the results of M. Marcet's analysis of gluten 

 and yeast : 



Gluten. Yeast. 



Carbon 557 30*5 



Oxygen 22-0 57*4 



Hydrogen .... 7 '8 4-5 



Azote 14-5 7*6, 



100- 100- Ibid. p. 27. 



NEW CHLORIDE OF MANGANESE. 



M.Dumas obtained this compound by putting a solution of man- 

 ganesic acid into contact with sulphuric acid and fused common salt. 

 Water and the new chloride are formed ; the former is retained by 

 the acid, the latter volatilizes in a gaseous form, with a greenish tint, 

 and when passed into a tube cooled to 5° or 4° of Fahrenheit, it con- 

 denses into a liquid of a brownish-green colour. The most simple 

 process appears to be to form a common green chameleon, to convert 

 it into red chameleon by sulphuric acid, and to evaporate the solution, 

 which will give a residue consisting of sulphate and manganesate of 

 potash. This mixture acted upon by concentrated sulphuric acid 

 produces the solution of manganesic acid, into which the common salt 

 is to be thrown in small pieces until the vapours which rise are co- 

 lourless j the latter effect is a sign that all the manganesic acid is 

 decomposed, and that muriatic acid only is produced. This chloride 

 of manganese corresponds in proportions to the manganesic acid $ it 

 is readily formed and examined, but not easily preserved. An ana- 

 logous compound is obtained when a fluoride is used instead of the 

 chloride, but a sufficient quantity for examination has not yet been 

 procurable. — Ibid, xxxvi. 81. 



ON THE POWER OF WATER AND BROMINE IN CONDUCTING 

 ELECTRICITY. 



M. de la Rive found, as had been previously ascertained by M. 

 Balard, that pure dry bromine did not conduct the electricity of a 

 voltaic battery, consisting of sixty pairs of plates very strongly charged, 

 a delicate galvanometer being the test. A similar experiment was then 

 made with pure water contained in a glass capsule, and communi- 

 cated 



