Chemistry and Physics. 455 
mercury in the usual manner and the gas to be analyzed is intro- 
epee: in amount about one-tenth of the capacity of the tube 
ean 
read. e 
results are calculated as usual. In a subsequent paper by Lothar 
Meyer, valuable suggestions are given on "s ee of > 
analyses.—J/. oc., Xlv, 581, Oct., 18 
4. On the Gpathasts of Galenite by means OP Thioe bo ela 
Emerson-REYNOLps has shown that the ready desulphurization 
of sulphur-urea or thiocarbamide by metallic oxides notably those 
of silver, mercury and lead, may be made use of for the purpose 
of obtaining their sulphides. hen heated with an sikadi-colyiios 
grams per liter. On mixing equal volumes of the two solutions 
= rot se a brownish color appears at about 38° to. 40 ., the 
hole becomes turbid at about 45° and a specular layer forms on 
Wotbcin and sides of the vessel, which increases in thickness con- 
tinually, reflecting light of the same color as a brilliant face of a 
crystal of native galenite. After ten minutes boiling the liquid is 
octahedral or etrahedral faces were observed. The is 
process for plating articles of glass and metal with Bec nti ta 
erent been secured by patent t.—dJ. Chem. Soc., xlv eas a sp 
‘'. n the Action of active and inactive Amyl sMovsdes pat 
of fear Paes a in presence of Aluminum chloride.— 
solution —— only isophthalic acid apparently: though mui- 
nute qua = of ordinary phthalic and of terephthalic acids 
were pres The inactive amyl indie also reacts upon toluene 
and Welds a eae boiling at 207° to 209°, which anv all 
Am. Jour. cgay Serres, Vou. XXVIII, No. 168, —DEc., 
