Chemistry and Physics. 399 
SCIENTIFIC INTELLIGENCE. 
I. CHEMISTRY AND ‘PHYSICS. 
_1. On the Freezing Point of Saline solutions.—Raovtz has con- 
tinued his researches on the action of dissolved substances in 
In the first series, the salts are those of potassium, sodium, ammo- 
nium, silver, lithium, cesium, and trimethylethylammonium. 
The tabulated results show that different salts of the same group, 
1. €., containing the same number of metal atoms in the molecule, 
show nearly the same molecular depression of the freezing point. 
one atom of the monad metal, gives values for the molecular 
depression varying from 27 to 36.* The second group, the salts 
of which contain two atoms of monad metal, gives the value 40. 
The third group, in which three monad metal atoms are contained 
m “94 ore gives the value 48. The fourth gives 47, and the 
e 
* > a, 
9 > depression of 15; and the polyads, as Ba, Mg, Al,, one of 
- From these partial values the molecular depression of any salt 
lo . The molecular depression produced by a salt is obtained by multiplying the 
‘ering of the freezing point of a solution containing one gram in 100 ¢.c, of 
Water, by the molecular weight. 
