410 Scientific Intelligence. 
deflects the plane of polarization to the right. The other radicals ob- 
, C 
tained are butyl-amyl C.oHse } , butyl-caproy] C.cH: and methyl- 
C x a ‘ wi des 
caproyl saat : ; . The author concludes his interesting memoir with 
many very ingenious and attractive theoretical suggestions, for which, 
owever, we must refer to the original.—Ann. de Chemie et de Phys- 
aque, xliv, 27 
. On organic compounds containing metals.—FRANKLAND, to whom 
we owe much of our knowledge of this interesting class of bodies, bas 
published an extended account of the results of his i fei thy of zinc- 
ethyl, which is doubtless one of the most remarkable of this class of 
bodies. ‘To prepare this substance upon a large scale, the author em- 
ployed metallic vessels (iron or copper) capable of resisting a strong 
ressure, in which the atotlels could be teased directly or afier they 
had been placed in glass tubes. In this manner four to five ounces of 
zinc-ethyl could be prepared at a single operation. In one of these 
vessels granulated zinc and iodid of ethy! mixed with —— were placed, 
both dried with extreme care: the whole was then heated for 12 to 18 
hours in an oil bath to 180°C. After opening the a aratus the con- 
tents were distilled off, the Sil enioes being filled with dry hydro- 
nic 
peculiar rather agreeable, smell. Its ae is 1:182 at 18° C.: it 
does not freeze at —22°; it boils at 118°, and distills without decom- 
position. The density of its vapor was found to be 4:259. It consists 
therefore of 1 vol. of zinc vapor and 1 vol. of thei gas, the two con- 
densed to one— 
1 vol. ethyl gas, _ 20039 
1 vol. zinc vapor, 2°2471 
1 vol. zine ethyl, 42510 
The condensation in this case is very remarkable and seems to lead to 
the conclusion that the combining vol. of the vapor of zinc is o i like 
that of hydrogen. The author suggests that its combining vol. 
negative elements. In the air it takes fire and burns with a brilliant 
blue green-edged flame, evolving dense vapors of oxyd of zinc, water 
and carbonic acid being simultaneously formed. When, however, a 
ethyl is mixed with ether and a stream of oxygen passed into the m 
ture, the gas is absorbed and a white precipitate soon separates 
products of the oxydation here were found to be ethylate of zinc, 
acetate of zinc, and hydrated oxyd of zinc. Iodine acts powerfully 
ge — the reaction being represented by the equation 
Sa age 
