ABRASIVE MATERIALS 437 



cate process, and used for saw ^umniors, no larjro cniorv 

 wheels have as yet been made. l']ven if larue vitrified enierv 

 wheels could be made, it is a question wlietiier their cost coulil 

 be lowered sufficiently to permit them to enter into competi- 

 tion w^ith the grindstone, and alsowhetlier the emery stone 

 would do as satisfactory work as the grindstone for certain 

 kinds of grinding. 



Of the corundum and emery used in the United States 

 about one half is produced in this country, the remainder being 

 obtained from the Turkish and (Irecian emery mines, and from 

 the Canadian corundun, mines. 



With the known oci urrences of this mineral in this coun- 

 try there should be no difliculty in such production of it as to 

 fully satisfy the markets' demand. Competition with the Ca- 

 nadian corundum will be strong, and if there is a decrease in 

 price, the location of the deposits for easy mining and sufficient 

 railroad facilities will need to be very favoral)le if the\- are to 

 be profitably worked. 



The more promising deposits of corundum in the United 

 States are in North Carolina, at Corundum Hill, ^hlcon county; 

 at Sapphire, Jackson county; and at Brick creek, Clay county; 

 in Georgia, at Laurel creek, Rabun county; and in Montana, 

 on the headwaters of Elk creek, Gallatin comity. The emery 

 deposits are near Peekskill, N. Y., and at Chester, Mass., the 

 latter furnishing the most of the emery produced in the United 

 States, 



