270 acne Scientific Intelligence. 
radicals do not differ essentially in properties from those already de- 
scribed by Lowig and other chemists, we shall content ourselves with 
giving their formulas and names, Am being employed as a symbol 
Methstannbiamyl, - . - Sn2 Ama 
Methstannamyl, + - - - Sn2Amsz 
Methylenstannamyl, - - - So Am2 
Stannamyl, - - - . - SnAm 
Bistannamyl,_ - - - - Sn2e Am 
and tin, but that while the amyl compound corresponding to ethstann- 
ethy! Sos Ams is wanting a radical is here met with to which the ethyl 
series affords no parallel, namely, Sn2Am4.—Journal fur practische 
Chemie, 62, 34. 
. New organic radicals containing arsenic—Canours and Bre- 
ig have still further extended our knowledge of this very interesting 
=(C2Hs)sAs.I+CsHeAsl. With the iodids of ethyl and amy! sim- 
ilar results are obtained, and the iodids of two new arsenic ammoniyms 
are formed having the formulas (C2Hs)2(CsHs)2As. I and (C2Hs)2 
(C1oH11)2As.I. These results in connection with those of Landolt 
already mentioned in this Journal, leave no doubt as to the constitution 
of cacody! which must be regarded as Dimethyl-arsenic.—Comples 
acteristic of the type R’R4 of the ammoniums. This appears to 
the case with the antimony and arseni niums so far studied, 
and I therefore suggest that careful experiments should be made to de- 
termine whether these compound ammoniums which can readily be 
prepared in the laboratory and at moderate prices may not answer in 
intermittent fevers, &c. as well as the expensive salts of quinine.— 
Ww. 
. Ge 
6. Action of iodid of phosphorus upon glycerine. —BERTHELOT and 
de Luca have observed that when crystallized iodid of phosphorus Plz 
is distilled with glycerine propylene gas is evolved, while water and ioda 
ted propylene CeHsl distill over. The proportions of is 
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