396 Scientific Intelligence. 
lutions of this oxyd having a bright blue color may be obtained 
by the action of moderate reducing agents upon vanadic acid in 
solution. 
um 
is 51:21 which the author adopts as the true atomic weight. 
Vanadyl dichlorid, VOCI,—137°9, is a light green crystalline 
. . . 5 4 os 
tion of hy: at ared heat upon VOCI,. It is a heavy shin- 
ing metallic powder resembling mosaic gold in a an- 
a current of ammonia. The dinitrid, VN,, is the black : oaooe 
obtained by Uhrlaub by heating the ammonium oxychlorid. The 
author promises to describe the compounds of vanadium with the 
halogens in another communication.— Proceedings of the Royal So- 
ciety, xvi, 220. Ww. G 
6. On the compounds of niobium and tantalum with chlorine 
H. Sarte-Crarre De d L. Troosr have 
communicated a few notes on niobium and tantalum which are of 
