422 Scientific Intelligence. — 
Columbite _ near Limoges, France ; by A. Damour, (C 
ire Nov., 1847.)—Specimens from this new locality, have a tar- 
nished bluish black color, and a density 7-651. wma RTI RE REE 
bic acid 82-98, oxyd of tin 1-21, oxyd of iron 14°62, oxyd of m 
nese, a trace, oidicn "422 23, It occurs in a yellowish white feld. 
spar, in a quarry near Chanteloub: 
5. On the Composition of Urano- —— and Columbite, (Phil. 
Mag., Jan., 1848, p. 77; Journ. de Ch. et de Phys., Nov., 1847.)—Ac- 
cording to a notice published in the cme Rendus Mensuels de 
P Académie de Berlin, Avril, 1847, p. 131, by M. Henri Rose, the 
yttro-ilmenite of M. Hermann is mere the urano-tantalite descri- 
M. Gustave Rose. M. Henri Rose has satisfied himself of their 
identity, by means br some oe of yttro-ilmenite which ha 
been sent him; his new experiments confirm his first results; and he 
has found it “ea to Risen any ilmenic acid from the mineral 
in question, which he considers to be merely niobic acid, mixed with a 
certain eure of tungstic acid. 
A rano-tantalite (the yttro-ilmenite of M. Hermann) 
no columbinan, M. Henri Rose proposes to give it a new name, 
Samarskite, in honor of M. Samarski, Director of the Min 
This mineral contains a little yttria and protoxyd of ma 
sides niobic and tungstic acids, oxyd of uranium, and prot 
the specimens of samarskite are mixed with colum 
— form of which is such as it has been described by 
ma 
The columbite of Siberia has been examined by M. Th. Bromeis: 
the acid which it contains is niobic acid nearly pure, with mere traces 
were felt at intervals o teen or twenty minutes, at Vavau, and other 
phenomena of a voleanic eruption have been observed. Mr. Williams, 
on nearing the island on the 13th, observed a little above the sea-level, 
a vast crater from which boiling lava issued in torrents and spread over 
the neighboring plains. But such was the violence of the action, that 
he was obliged to return without having ascertained the fate of the un- 
fortunate =. 
d, an nd the columa of sales hints it ejected above the clouds. 
or stream flowed to the north of the mountain, without causing 
any dama 
