Chemistry and Physics. 587 
SCIENTIFIC INTELLIGENCE. 
I. CHEMISTRY AND Puysics. 
ers this reaction to that obtained with stannic chloride by 
Sharples* and also by Stolba, since this produces precipitates 
with rubidium salts, difficultly soluble in hydrochloric acid, and if 
ammoniacal salts be present, throws down also the ammonium 
double salt; whereas both the ammonium and the rubidium 
double antimonous chlorides are easily soluble in concentrated 
hydrochloric acid.— Ber. Berl. Chem. Ges., vii, 375, April, 1874. 
r 
readily souisianheated to phosphorus by placing it for a short time 
in an arsenical solution, preferably acidified with hydrochloric 
acid. In thin layers, this form of phosphorus is translucent, and 
: ’ 
and if preserved in water, the arsenic oxidizes and goes gradually 
into solution. e quantity of arsenic phosphide which is neces- 
sary to produce this blackening of phosphorus is very small, half 
of one in some cases even less, g entirely suffi- 
in fusion at a temperature of 50° for eight to ten hours. I 
very slowly cooled, On breaking the tube at the narrowed point, 
* This Journal, II, xlvii, 178, 1869. 
