Chemistry and Physics. 809 
SCIENTIFIC INTELLIGENCE. 
I, CHEMISTRY AND Puysics. 
cat Hofmann, of making fhe tau un reduced 
pressure. For this purpose the neck of the balloon, which is made 
serves as a receiv er, and then t through this with a Bunsen pump 
furnished with a manom waist to indicate the residual tension. 
After the substance—about one gram—is introduced into the bal- 
loon, and this is lowered into a bath and connected to the pump, 
an exhaustion of 500 or 600 millimeters is effected, the cock to 
the pump is closed and the heating is proceeded with, a tempera- 
ture mene than that at which the substance boils, never ae 
for the reduction of sake —Liebig’s Ann., clxxxvii, 341, June 
1877. F. 
2. On the action of Phosphoric chloride on Tungstic ‘ovide.— 
Trev has proved that the sole products of the action of tungstic 
oxide upon phosphoric chloride are phosphoryl! chloride and tung- 
stic chloride (tungsten hexachloride ) Equivalent weights—three 
molecules PCl, and one of WO,—of the pure substances were 
sealed in glass tubes, well sbakelt. and peste) in a paraftin bath to 
for six or eight t hours. One , brilliant metallic 
D i 
traces of PO Cl, were des pinived and the crystals obtained 
pure, For quantitative analysis, a weighed quantity was heated 
to 100° in a sealed tube with water and nitric acid, and the chlo- 
Tine determined as usual. The result showed the "crystals to be 
be obt ained of | ge an es size. ‘The crystals are inne, and 
fuse at 189° is given b the Geen 
