46 Whitney's Chemical Examination 
that name, which may be dropped till the real * hydrous sili- 
cate of yttria, thorina and oxide of iron” to which that name 
was given, shall be found. "This mineral, to which I shall 
give the name of Ferrotitanite, is an anhydrous silicate and 
titanate of lime and oxide of iron. 
The ferrotitanite fuses readily before the blow-pipe with- 
out intumescence, and gives a black glass. 1t gives with 
the fluxes, beads colored with iron, and with soda, a trace of 
manganese. The salt of phosphorus bead, gives in the redu- 
cing flame the characteristic color of titanium, which appears 
still more distinctly by the addition of tin. 
The mineral is readily dissolved by chlorohydric acid, if 
finely pulverized, the silica separating as a flocky powder; 
though, as H. Rose bas remarked, under whatever circum- 
stances the solution be effected in the analysis of a titanifer- 
ous silicate, the silica separated always contains titanic acid. 
The following are the results of the analyses : 
qo ei bs I. Il. IT. 
Silica 27.89* 25.66 *, 95.14 
Oxide of iron and a * 
, little manganese E has 
Lime 30.05 29.78 
Titanic acid 20.43 22.10 
100.27 99.12 
In I. and II. the mineral was attacked by chlorohydric 
acid. The amount of silica in I. obtained by filtration was 
27.89 per cent. This silica contained titanic acid and a trace 
of lime, which was not however separated. In II. the silica 
separated after solution was 28.00 per cent.; it was treated 
with concentrated sulphuric acid till no more was dissolved, and 
2.34 per cent. of titanic acid was found in it. The remaining 
substance, after being washed, ignited and weighed, had all the 
properties of pure silica. To test the accuracy of the deter- 
mination of the silica another portion of the mineral was 
* Contained titanic acid which was not separated. 
