166 Scientific Intelligence. 
5. Onthe Separation of Arsenic from Tin and Antimony. —At 
the suggestion of Classen, Hurscumipr has made a series of ex- 
riments on the aspiinition of arsenic from antimony and tin by 
distillation of its chloride. He finds that if the arsenical solution 
is brought to about 250 c.c. by the addition of concentrated hydro- 
chloric acid and then completely saturated with HCl gas and dis- 
seit in a current of this gas, the volatility of the arsenous chloride 
uch that nearly the whole of it is removed before the first 
leon s of distillate enter the receiver. After about 50 en. of the 
distillate has collected in the receiver, no trace of arsenic can be 
detected in the subsequent portions. "To condense this v ery vola- 
tile body a Woulfe’s bottle of about 900 ¢.c. is used as a receiver, 
containing from 300 to 400 ¢.c. of water or of potassium hydrate 
solution of sp. gr. 1:1 to 12. The results of the separations effected 
by this method which are given seem to ee Sip se 
— Ber. Berl. Vhem. Ges., xvii, 2245, Oct. . B. 
6. On the ‘Purification of Eo stk _p Hore has 
examined for arsenic the commercial zines found in France, and 
nds, for one kilogram of sheet zine, Vieille-Montagne, 36, 30 and 
tagne and Silesia, gave only traces. In order to marty this arsen 
iferous zinc the author recommends to project into the meld 
metal one to one and a half per cent of anhydrous nee 
chloride. On stirring, er fumes of zine chloride mixed with 
arsenous chloride are evolved. If now the metal be poured into 
water to granulate it, the zinc obtained is free from arsenic and 
is readily attackable by one-tenth sulphuric acid. The same pro 
cess will free zine from antimony.—Ann. Chim. Phys., V1, Be: 
141, pos 1884. 
7. Perseite, a new Sugar.—Muntz and Marcano ‘have 
Pactbie ees a new sugar obtained from the seeds of the Lawrus 
— a tree growing in the tropics. This sugar bad been ob- 
rved by wise oe in 1831, and by Melsens later; but it was by 
‘ierh supposed to be m annite. It is extracted by boiling alcohol 
from which it crystallizes on cooling. Analysis gives it the for- 
mula C,,H,,0,,, isomeric with mannite. a oint of fusion }§ 
183 +5°-184%, while that of mannite is 20° low It is very solu 
ble in hot, less so in cold water. Even in conbcmerated solution 
it has no action in the polarimeter. On adding borax however to 
a 4 per cent solution it gave a rotation to the ‘right of 055°. It 
does not reduce copper solutions and is not fermentable. Boiling 
nitric acid converts it into oxalic acid, without the production of 
mucic acid. A mixture of strong nitric and sulphuric acids gives 
a baer a fo which Jesoniaee. violently by a blow and — 
taneously decomposes.—Ann. Chim. Phys., VI, iii, Hee: 
1884, 
8 
8. wig Abe a Coloring matter resembling that 8 Tite 
Travs and Hock have shown that when resorcin is heated with 
a small nuaiy of scilivs nitrite and some water to a tempera 
