262 



The Ohio Journal of Science [Vol. XXI, No. 8, 



The Everhard Company. In the Everhard quarry, which 

 was opened in 1884, a maximum of 60 feet of sandstone is 

 quarried. The rock is broken by two jaw crushers and is 

 further reduced in rolls. It is then passed through a rotary 

 drier and finally over screens. The coarse material caught 

 by the screens is returned to the finishing rolls and is again 

 screened. During the milling, dust is withdrawn by high speed 

 fans and the product marketed. The capacity of the plant 

 is about 200 tons per day. 



The products are steel molding sand, furnace sand, core 

 sand, and formerly glass sand. The molding sand is passed 

 through a 5 mesh screen, while the furnace sand is passed 

 through a 2 mesh. The molding sand is well adapted for large 

 steel castings and has a market at Pittsburgh, Cleveland, and 

 Cincinnati, as well as at intermediate places. Massillon is 

 the chief market for core sand. In recent years but little 

 sand has been marketed for glass making and the rock must be 

 carefully sorted for this purpose. 



Four samples from this plant were analyzed and the results 

 follow : 



Silica, Si02 



Alumina, AI2O3 



Ferric oxide 



Calcium oxide, CaO 



Magnesium oxide, MgO 

 Titanium oxide, Ti02. . 

 Sodium oxide, Na20. . . 

 Potassium oxide, K2O. . 

 Loss on ignition 



Furnace 



bottom 

 sand. 



96.29 

 1.63 

 .33 

 .03 

 .00 

 .20 



.43 



Core sand. 



95 

 1 



. 10 

 .60 



.81 

 .00 

 .02 

 .15 

 .12 

 .26 

 .68 



Dust from 

 mill. 



8-1.02 



8.78 



2.09 



.03 



.02 



.72 



2.65 



Selected 



chips from 

 quarry face. 



96.51 

 1.90 

 .58 

 .07 

 .01 

 .12 



.56 



Carefully selected chips from the quarry face, when examin- 

 ed with a microscope, showed the following minerals present. 

 They are named in order of their abundance. 



1. 

 2 

 3; 



4. 

 5. 



Quartz. 



Limonite. 



Kaolinite. 



Feldspars. 



Muscovite. 



6. Hematite. 



7. Sericite. 



8. Zircon. 



9. Magnetite. 



