214 Screntific Intelligence. 
columbic oxide, sodium carbonate and pure carbon thus heated to 
whiteness, affords a crystalline mass of an olive color and friable. 
Heated to the temperature of fusion of nickel for six or seven hours, 
product formed at the temperature of fusion of steel contained } 
of a molecule of the latter to one of the former; when heated fora 
longer time 4 of a molecule; and that formed at the temperature 
of fusion of manganese, 1 to 1. Tantalic acid thus treated acts 
similarly except that the carburation may be carried higher; one 
product, of a beautiful bronze-yellow color, obtained at the tem- 
perature of melted steel, containing only 0-7 per cent of nitrogen. 
—Bull. Soe. Ch., Tl, xxv, 506, June, 1876. GF. B 
4. New mode of effecting the Substitution of Chlorine or 
Bromine in Organic Compounds.—DamotsEau has called atten- 
fumes of hydrochloric acid appear, and oily drops collect on the 
walls of the tube. By varying the proportion of the two gases, 
monochlorinated, dichlorinated, trichlorinated, tetrachloine= 
: ingly 
er. : 
with pumice, wood charcoal, alone or platinized, or even with 
platinum sponge itself, the effect is insignificant.— C. ., xxx, 
60, July, 1876, O. Fle 
5. On Physical Isomerism.—In studying nitrometachlormtro 
ment of it, as the liquid cools. The crystals ar 
. . 1 - 9980 
with a well-defined cleavage, in which a: b:e1°8873: 1° ; 
