132 » Scientific Intelligence. 
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ammoniac, and at the same time as the only one possessing @ different 
another notice we hope to give the conclusion of the author’s furilion 
hone researches upon this subject—Pogg. Ann., xcvi, 195, 
Oct., 
7. On quantitative determinations of sugar in urine—WicxE and 
NG a instituted a comparison of the results obtained in the de- 
sperinasie of diabetic sugar by fermentation, by means of solutions 
of copper, and by the optical method. The general result is that the 
copper method gives about one per cent. more sugar than the method 
of fermentation, and that the optical method agrees best with the latter. 
n the absence of any absolutely accurate process it is not easy to infer os 
pst the investigation in se which of the three methods istobe 
fee eae 
preferred.—Ann. der Chemie und Pharm., xcvi, 87. 
8. a new method of preparing Propylene. —Dvusacu has pre- 
sented to the Academy of Sciences a note upon a new method of pre- 
paring this gas which possesses much theoretic interest. hen a mix- 
ture of an alkaline acetate and oxalate is distilled in such a manner 
that acetone in the nascent state is prong into contact with carbonic 
xyd ad of 
also nascent, there is a decompositi the acetone and forma- : 
sia of carbonic acid and propylene. ‘he i 
rs ~— Cel 6O02+2C0— CeHe. 
produced at the same time, and the quantity of = Ai indicat 
theory is never obtained. It is very interesting to remark tha 
, h 
lute acid.—Cannizzaxo has succeeded in obtaining the com 
H7Cl by the action of chlorine upon toluol and the fractional dis' 
tion of the products. T he chlorid boils at 175°-176° C i 
formed. id of lb € 
ammonia and finally dissolves enplotely The solution on additio 
id gi ne precipitate of toluic acid. 
Comptes comet r xli, 517. 
1 
. On amylic alcohol. —Pasrevr P aiaiie the very i interesti ng ‘ 
covery that raw am generally of two chemica 
‘muailas but oy, differen rev these bodies is active @ 
the other passive a [ 
of the former are active and Geeneat 
