300 Notice of some Recent 



9-6511 17-50 



Its formula is C 2 H 2 I. 



Bromide of aldehydene. — If we mix some bromide of 

 deuto-carbydrogen with a concentrated solution of caustic 

 potash in alcohol, a white precipitate subsides, the liquor 

 effervesces, evolving a peculiar odour. If the mixture is 

 kept at the temperature of about 95°, a gas distils over 

 having an odour of garlic. This is bromide of aldehydene. 

 It maybe purified bypassing it through water and chloride 

 of calcium. The density of its vapour is 3-691. Analysis 

 gave its constituents, carbon 22-674, hydrogen 2-923, bro- 

 mine 74-603. It appears, therefore, to contain just half 

 the quantity of bromine which the bromide of deuto-carby- 

 drogen possesses. I should, therefore, be inclined to con- 

 sider its formula C 2 H 2 BH, notwithstanding the new name 

 which Regnault has given it, and the theoretic views which 

 he has propounded. It is, therefore, a sub-bromide of 

 deuto-carbydrogen . 



Iodide of aldhydene is formed in the same way as the last 

 compound. A gas comes over with an odour of garlic. 

 When exposed to the cold of a mixture of ice and marine 

 salt, a portion is condensed which is the iodide. The den- 

 sity of its vapour is 4-78. This corresponds nearly with 



2 volumes carbon, . -8333 1-5 

 2 volumes hydrogen, -1398 -25 

 i volume iodine, . 4-3390 7-875 



5-3122 9-625 



This is also a sub-bromide of deuto-carbydrogen. — (Ann. de 

 Chim., lix. 358.) 



M. Darcet Fils has also examined the first two com- 

 pounds. The results agree with those of Regnault.— (Journ. 

 de Chim. Medic, i. 377. 



VII. Composition of the Dutch liquor. — Regnault has 

 examined this substance after taking every precaution to 

 purify it, and has found its composition the same as that 

 obtained by Dumas, viz. 



