112 Scientific Intelligence. 
dence which does not increase our confidence i 4 his results.—Blomstrand 
tn alain mt Chemie und Pharm., exxxv, p. 19 ore = the same, 
; Hermann in Journal fir prakt Chemie, + v, Ww. G. 
soot one methyl- benzyl.—The identity of toluol with aoe -phenyl, 
o? a , was demonstrated some time since by Fittig and Tollens, but 
these chemists found that xylol was not identical with ethyl-phenyl 
he Hq E though isomeric with it. Fittig and Glinzer have now shown 
12°"5 : 
that xylol is identical with methyl-benzy], Ona, t, which may beob- 
tained by the action of sodium upon a mixture of bromid of benzyl 
C,,H,Br, and iodid of methyl, C,H,I. As thus prepared xylol boils at 
139°. Ethyl-benzyl, c " t, prepared in a similar manner boils at 
150° C., and —— not to be identical with cumol.—Ann. der ~<_ 
und Pharm., lvi _G. 
3. On the eee of chlorine, bromine, ‘and iodine, by means bee the 
spectroscope.—A. MitscHERLicu has s ucceeded ina p lying t the spectro- 
scope to the detection of extrem mely minute tspeaten of Hiya bromine 
oa iodine, and has thus ae eae extended the the instrument. 
loid salt of copper m nikes its appearance as described and figured by the 
author in a former paper. In this manner without further suction: t of 
cent of chlorine, 4 per cent of a and 1 per cent of iodine 
may be detected. As sulphate of ammonia gives a spectrum of its own, 
its use is disadvantageous when small quantities of chlorine, bromine and 
iodine occur together. In this case it is better to precipitate with a salt 
= silver, mix the precipitate with twice its weight of oxyd of copper, 
this manner we ses detect ro per ae of 
chlorine, per oent of bromine and 4 per cent of iodine in the prec 
The spectra follow each catiee 4 in ty snaies first that of Plorid, 
then that of vaifferent d and lastly that of iodid of copper; an effect which 
dla 
cipitate after anti a shor time examined as above. In this magnet age 
follows that one 6 fad millionth “of beotisinlé can be detected by the s ae | if 
scopic method, and the reaction of iodine is equally delicate. In 6} 
