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



Oliver Silica Sand Company. This plant is located about 

 one-fourth of a mile east of that of the Franklin Industrial 

 Company. About 40 feet of the Sharon is worked. The rock 

 is treated in much the same manner as in that of the adjacent 

 plant and the product, of course, is similar. Its principal 

 use is for steel castings, furnace bottoms and cores. 



Chalfants Plant of the Central Silica Company. This plant is 

 located between Chalfants and Glenford, on the Baltimore 

 and Ohio Railroad, in the northern part of Perry County. 

 The rock is the Sharon and it there shows more variation than 

 was found in the quarries of northeast Ohio. The old quarry 

 just south of the mill has been abandoned, except for the 

 ganister, which ranges from 18 inches to 12 feet in thickness 

 and which lies at the top of the Sharon. The ganister is finer 

 grained than the rock below, is well cemented and has a color 

 which ranges from light gray to brown. 



The new quarry which is now the source of rock, except 

 for ganister, is situated nearly a half mile south of the mill. 

 A maximum of perhaps 35 feet of rock, exclusive of 4 to 6 feet 

 of stripping, is worked. The rock is coarse-grained and in 

 places pebbly, but these lie in pockets rather than in beds. At 

 present the stripping is run through the mill, but the company 

 is now removing this waste by a drag line system. The rock 

 is loaded on cars with a steam shovel and transported to the 

 mill by a dinky engine. 



The rock is broken in an oscillating crusher and is carried 

 by gravity to a dry pan which is operated wet. This reduces 

 the rock to sand, which is transported by gravity to a 6-mesh 

 rotary screen. Any coarse material which cannot pass through 

 the screen is carried back to the dry pan. From the screen the 

 sand runs into a sluice box and is pumped from there to the 

 washer. Here the coarse sand settles to the bottom and is 

 removed, while the find sand passes over the top with water 

 into a settling tank, where the sand collects on the bottom and 

 the clay is carried with water over the top and flows into the 

 creek. This sand is used for steel molding purposes. 



The coarse sand (6-mesh) referred to in the last paragraph is 

 conveyed by gravity to a pile outside of the mill and in that form 

 is used for furnace bottoms and in brick making. Much of the 

 greater part of this pile, however, is transported by a drag 

 to an elevator, which lifts it to the top of the drier, through. 



