Chemistry and Physics. 113 
pounds of sea water the author detected jeer the spectrum lasting 
seven minutes, but the iodine reaction could not be obtained from this 
per is to be placed in the bulb nearest the flame, and the organic sub- 
stance in the other; the products of the distillation > the organic mat- 
ter are thus carried over the heated metallic copper, and in this manner 
the smallest traces of chlorine, bromine and iodine may be detected even 
when traces of one are present with a large excess of the others, The 
author did not succeed in making ag sesasa fl quantitative determinations 
by the above mentioned process. In conclusion, Mitscherlich states his 
conviction, based upon spectroscopic accuiaiece that iodine and nearly 
all the other metalloids are compound bodi ies, and promises to describe the 
pole came upon which this conclusion is founded.—Pogg. Ann., exxv, 
p. 6 Ww. G. 
erence of about 30° pa eac. ch ott, y the acti n of nohepere’ upon 
silicate = ethyl ” authors sbutned a liquid Botti between 148° and 
147°C., and having the formula Si€,H,,@,, which corresponds to a 
diethyl. iainsaslig! silicate. The action of chlorid of silicium upon puri- 
fied and dehydrated wood-spirit produces normal silicate of methyl and 
hexa-methylic bisilicate. The former is a colorless ae with an agree- 
aie ethereal odor, very soluble in water, and burning with evolution of 
White vapors, Its formula is Si(€H,),0@,. The other silicate is a 
liquid; it boils at 201°-202'5°, Its formula is Si,(€H,),0,- The 
Merence between the boiling-points of the normal silicates of methyl 
and ethyl is 44° C., or o only 11° for a molecule of €H,. The difference 
between Pag boiling: “points of the disilicates is 33°, or about 5° for ~~ 
—Bulletin de la Société Chimique, May, 1865, p. 356. 
. “evtendg metallic radicals,—The researches of von Oefele upon 
the oo of sulphur with ethyl have already been mentioned in 
this Jour Cahours, without, as it appears, waiting for the comple- 
tion of ck (ores investigation, has taken up the iy and has pre- 
Pree, # number analogo ies 
Mine upon sulphid of methyl (C,H,)2S, the author shinies a body 
lizing in beautiful octahedral ambe reoloted: ¢ crystals having the 
forma 8 2} ee Oxyd of silver decomposes this substance and yields 
2 ee 
8, | oe which is entirely neutral to test paper. Todid of methyl ae, 
energetically upon sulphid of methyl and yields a white crystalline mass” 
ee the formula S, | “ 3, The ane become brown under the i in- 
si= 
du Jour. Scr. shite icici: Vou. uty No. dak 1866. 
15 
