276 Scientific Intelligence. 
Das Buch der Natur, par Dr, Fox. Scnorpier, 11th edition, 2 vols. 8vo.—This is 
a work of the same class as the preceding but much more complete, for it enibraces 
not hysies, but physical geography, astronomy and chemistry. The first 
edition appeared in 1844, and was received with such favor. that it has 
through eleven editions in sixteen years. 
tu kysiologiques sur les Animaleules des Infusoires Végétales, par Pavt 
Laurent, Professor a Ecole Forestiére de Nancy. 2 vols. in 4to with numerous 
illustrations. This work has acquired much importance from the recent discussions 
upon spontaneous generation. M. Laurent has given the results of 25 years of 
observation. The first volume is entirely devoted to infusoria, the second volume 
treats especially of the elementary organs of vegetables. 
stir iaaeaanatiisiiilia 
SCIENTIFIC INTELLIGENCE. 
I. CHEMISTRY AND PHYSICS. 
1. On a Compound of Boron with Ethyl—Fraxxtanp and Duppa 
have succeeded in forming a combination of ethyl and boron by the 
action of zine-ethyl upon boric ether. The reaction is represented by the 
equati 
ath 
2(BO, .8C,H,0)-+3Zn,(C,H,), = 2B(C,H,),4+-6C,H,0, 200. 
to be interrupted. The remainder in the retort solidifies to a crystalline 
mass, which is a combination of ethylate of zine and zinc-ethyl. he 
distillate after two rectifications, boils between 95° and 97°. It then 
5 
5° 
corresponds to the formula B| C,H Borethyl is a colorless soluble 
EC 
; 
@ 
atts 
liquid which has a sharp odor: its vapors strongly irritate the muoow 
membranes and provoke a flow of tears. Its density is 0°6961 at 28 + 
it boils at 95° ; the density of its vapor is 3°4006. The theoretical vapor 
density, calculated according ‘to the condensation of chlorid of boron, 
would be 3°3824. 
Borethyl is not easily decomposed by water, in which it is i 
The liquid itself spontaneously in contact with the alr @ 
aH, ae 
formula B C,H .0,. 
C,8,0,, + 
This compound dissolves immediately in water, decomposing into 
hol and a white crystalline substance which may be sublimed 
alteration in a current of carbonie acid gas. It then forms ma 
