2& ILLINOIS STATE ACADEMY OF SCIENCE 



Another kind of iron ore is abundant in the south and 

 elsewhere but it is not mined because it contains titanium. 

 It is of some importance to know the form in which this 

 objectionable constituent occurs in the ore mineral, as 

 the titaniferous ores will probably be needed at some 

 time in the not very distant future and it is desirable 

 to know whether the titanium can be removed from the 

 ore without reducing its iron content. Photographs of 

 sections of some of the ores were thrown on the screen 

 and it was seen readily that the titanium is present as 

 little particles of the mineral rutile imbedded in the 

 magnetite which is the ironbearer. The rutile is not 

 magnetic; consequently if the ore is ground to the fine- 

 ness of the grains of rutile in it, all the magnetite, which 

 is magnetic, may be withdrawn from the powder by elec- 

 tro-magnets and may be used as an iron ore. 



Incidentally a number of veins in the mountains in the 

 vicinity of the mines in North Carolina and Tennessee, 

 and a number of sections of the iron ores of the Lake 

 Superior region were shown on the screen. 



