116 Scientific Intelligence. 
in which one atom of ethyl is replaced by one atom of amyl. When chlo- 
rid of silicon and zinc-ethyl are heated together in a sealed tube, a lim — 
pid liquid is obtained, which is insoluble in water, and not acted upon 
a concentrated solution of potash or ee nitric acid. This liquid is silicon- 
ethyl, the formula of which is “C, WT 2 t The density of the vapor of , 
silicon ethyl is 5°13 by observation and 499 by theory: it corresponds 
in constitution to distannethyl, Sn,(C,H,),, and diplumbethyl, Ph, 
(C, . The authors promise a more extended 6 study of this 14 
which, as the first organic nips esa “artis only of silicon, ree : 
and hydrogen, is of much interest. The a SiO, or Si,0, 
silicie acid appears to be at last definitively wtabliaied — Comptes ad, x 
lvi, 590 
6. On the coloration of flame by phosphorus and its compose 2 | 
CuristopLg and BeiisteIn —_ that, when phosphorus is added to the — 
‘materials for preparing hydrog n, the flame takes a beautiful emerald: 
green color. With the spectroscope, this flame gives two ma nificent 
green lines having about t egree of intensity, and a third rather 
phorus, phosphorous and hypophosphorous —_ give the same result, 
This reaction is extremely sensitive, and may be used in cases of ere 
by phosphorus, and in detecting the presence of minute papa 
phosphorus in iron.— Comp les Rendus, lv, 3 
ANatytTicaL CuHemistry. 
et an pee Af nitric acid by conversion into ammonia.— 
14th of June, 1848, J. C. Nesbit read — sad Chemical Society af 
Rv Se awe Rey 
NO,H+8H=NH,+6HO, ; 
Nesbit ascertained that, by the observance of certain eae 
whole of the nitrogen of nitric acid or of nitrates may be thus t 
hyd n, and obtained as ammonia. His directions are as follo 
“If ten grains of salt, such as nitrate of potash, be taken for analysis, a ai 
rters of an ounce of chlorhydric acid, sp. gr. 1°17, must be pouté 
out into a small measure, and about one-tenth part added to the zine a0 
water. When effervescence has fairly commenced, a portion of | 
re. “The temperate ure of the whole must, if necessary, 
8 ns the vessel i in cold water. After a short period, a little 
