THE MIXING AND QUARRY INDUSTRY I90S 39 



diameter from 15 inches to 54 inches or even larger and are used 

 for the grinding of paint, grain, cement, gypsum etc. The chasers 

 are stones dressed to run on edge on a platfonn of blocks of the 

 same material, and are used in grinding heavier material such as 

 quartz, feldspar, barite etc. Depending largely on tlieir weight 

 for crushing the fragments, they are of large size varying in diam- 

 eter, as produced in 1908, from 54 to 72 inches. 



The production has been decreasing steadily for some years 

 owing to the introduction of roller mills in flour making, and ball . 

 mills, emery stones and other improved grinding machiner}' in 

 other industries. The demand for millstones is now largely from 

 corn-grinding mills in the south and from gypsum and plaster 

 mills, while chasers are still used in quartz, feldspar and barite 

 mills. 



Millstones varied in value in 1908 from $3 for 15 inch, to $45 

 for 54 inch stones, while chasers sold for $30 to $70 varying in 

 size from 54 to ^2 inches. 



The production in 1908 amounted to $18,341 as against $21,806 

 in 1907. The number of millstones made was 871 and chasers 182, 

 and in addition a small production of blocks and disks for use in 

 roll crushers. 



MINERAL PAINT 



Under this title are included the natural mineral colors which 

 require nothing more than washing or grinding in their prepara- 

 tion for the market. The raw materials found in the State that 

 have been used for the purposes are iron ore, ocher, shale and 

 slate. New York is also one of the leading producers of artificial 

 jigments, specially those made from lead, but the crude materials 

 are mostly derived from without the State. 



The Clinton hematite aflfords an excellent base for the manu- 

 facture of metallic paint and mortar color. The beds with a rela- 

 tively high iron content are employed, as they possess the softness 

 and utiiformity of texture, as well as depth of color, which are 

 generally sought for. The mines owned by C. A. Borst at Clinton, 

 Oneida co. and those of the Furnaceville Iron Co. at Ontario. 

 Wayne co. supply most of the ore for paint. The hematite from 

 the former locality belongs to the oolitic variety and that sold to 

 paint manufacturers carries about 45 per cent iron. The ore in 

 ( )ntario county is of fossil character carrying about 40 per cent 

 iron. The red hematite from St I.nwronrc county i*^ riKo u^^i^d for 

 metallic paint. 



