140 Scientific Intelligence. 
SCIENTIFIC INTELLIGENCE. 
I. CHEMISTRY AND PHYSICS. 
ula InCl, requiring 7°60, thus proving indium to be a perissa 
These authors have now rendered their method available for much 
higher temperatures, optically a bright yellow, lying between the 
fusing points of cast and of wrought iron, by the use of bulbs of 
porcelain, heated in a Perrot’s gas furnace. The operation is con- 
d 
1560°. Sulphur-vapor at this temperature, was found to have @ 
density of 2°17, 8, requiring 2°21. As Deville and Troost found 
2°23 at 1040° C., S continues to be diatomic at higher tempera- 
formula As,O,, which 
requires 13°68. This agrees with Mitscherlich’s results and shows 
that the opinion of Kolbe that arsenous oxide would split up like 
‘sulphur, into smaller molecules at higher temperatures, 18 not 
correct, the formula being As,O, alike at 571° and 1560. Its 
See : 7 Asc _AS8 No or 
constitution must therefore be either O —QO—". 
NAs—O00—As” 
oats | ae 
As As 
Glo4rs yo. Cinnabar gave a density of 5°39, the form 
Nas OAs 
ula Hg,S, requiring 5-34.— Ber. Berl. Chem. Ges., xii, Aig chee: 
1879. G. F. 
2. or-densities of Metallic Chlorides.—Victor and CakL 
Meyer give, in a later paper, the results of some deter 
by their method, of the vapor-densities of certain metallic . 0- 
rides. Stannous chloride, at the temperature of 619° Ina poe “ 
melted lead, gave 12°85; at 697°, 13°08. Hence its formula sho 
Sn,Cl, via requires 13°06. Zine chloride, determined 2 
891° and 907° in the Perrot-Wiesenegg e furnace, gave # 
_* This Journal, III, xvii, 63, Jan., 1879. 
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