from the RIVER DEE. 263 
Titanium, - 41.1 
Iron, - - 39-4 
Uranium, - ae 
Silica and alumina, 20.0 
103.9 
Here, then, is ftill an excefs of nearly 4 per cent. But this I 
am difpofed to afcribe to the oxides of titanium and uranium, 
having been only dried upon the fteam-bath. Upon the whole, 
it appears, that, in the fpecimens of iferine analyfed, the pro- 
portions of titanium and iron were nearly equal, and that the 
uranium did not exceed 4 per cent. The appearance of uranium 
furprifed me a good deal. I perceive, however, that it has al- 
ready been detected in this ore, from an analyfis publifhed by 
Profeffor JamEson, in the fecond volume of his Mineralogy, 
which, I underftand, was made by Lampapius. The fpeci- 
men examined by Lampanptus yielded very nearly 60 parts of 
titanium, 30 of iron, and 10 of uranium. Whereas, in mine, 
if the foreign matter be removed, there was obtained, very 
nearly, - - 48 titanium, 
48 iron, 
4 uranium, 
a 
Too 
But, there can be no doubt, that the iferine which I analyfed 
was ftill contaminated with a good deal of iron-fand; for it 
was impoflible to remove the whole. 
13th 
