378 Scientific Intelligence. 
. 
s 
on decomposition, were ethyl hydride and ethylene in equal yol- 
umes. hen water is present with the ethyl iodide and the 
couple, evolution of gas takes place at once, even at 14 
amounting in the course of 36 hours to nearly the theoretical 
acts readily at about its boiling point, 146° C., five e.c. of it being 
> 
hydride and amylene, distil over, and the ask contains a liquid 
cluded, and then rapidly distilling, zinc-amyl was obtained, but 
452, 678, May and July, 1873. G. F. ai 
2, On a Method of Estimating Nitric, Chlorie and rf . 
Acids.—Tuorpe has ingeniously applied the copper-zine eoupre 
above described, to the determination of nitric, chloric a 
acids. When a small quantity of niter is added to the water ee 
rounding the couple, and the whole is gently heated, no hy ps ; 
1s evolve , but a distinct odor of ammonia is perceived, and t 
liquid in the flask becomes alkaline from the production of pe 
sium hydrate. Quantitative experiments showed that the psig 
sion of the nitrogen into ammonia was complete. They were ©? a 
ducted as follows: 40 grams of thin sheet zine were placed ” 
