254 



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



conglomerate. The quarry is about \]/2 miles north of the 

 mill and has a face three-fourths of a mile long, with a maximum 

 height of 60 feet. The rock is a mass of loosely cemented 

 quartz pebbles, the largest measuring about two inches in 

 diameter. The color of the rock face is buff, except near the 

 base, where it is gray. 



The rock is crushed, screened and washed and in the process 

 between 2 and 3 per cent of the material is reported to be 

 lost. Steel molding sand is the principal product. Only one 

 grade is made and that must pass through an eight-mesh 

 screen. The market for this material includes Ohio, West 

 Virginia, Pennsylvania, New York, Michigan, and Indiana. 



Other products of this plant are core sand, sand blast 

 sand, filter sand and gravel, roofing gravel, traction sand and 

 gravel for highway construction. Sand blast sand is shipped 

 to New England, Alabama, Iowa and intermediate states. 

 Filter sand and gravel have even a wider market. Sand blast 

 sand is dried by artificial heat, re-screened and divided into 

 five grades. About 200,000 tons of material are shipped per 

 year during normal times. 



Three samples of sand gave the following results: 



Silica, Si02 



Alumina, AI2O3 



Ferric oxide 



Calcium oxide, CaO. . . . 

 Magnesium oxide, MgO 

 Titanium oxide, Ti02. . . 

 Loss on ignition 



Steel molding 

 sand, washed. 



98.14 

 .16 

 .35 

 .38 

 .05 

 .08 

 .31 



Fine-grained 



blast sand, 



washed. 



98.46 

 .17 

 .23 

 .17 

 .00 

 .03 

 .28 



Coarse-grained 



blast sand, 



washed. 



98.04 

 .24 

 .28 

 .21 

 .01 

 .03 

 .30 



A microscopical examination of steel molding sand from 

 this plant showed the following minerals, named in order of 

 their abundance: 



1. Quartz. 



2. Zircon. 



3. Kaolinite. 



4. Limonite. 



5. Muscovite. 



6. Tourmaline. 



