| OCR Text |
Show BIG INCREASE IX GRINDING MATERIALS The value of abrasive materials mater-ials produced in the United States in 1916 was $4,600,248 according ac-cording to statistics compiled by F. J. Kratz, of the U. S. Geological Survey, Sur-vey, Department of the Interior, Of this, $1,664,339 was the value of natural abrasive materials, and $2,-935,909 $2,-935,909 the value of artificial abrasives. abra-sives. The abrasive materials im ported for consumption in 1916 were valued at $555,850. The apparent appar-ent total consumption of abrasive materials in 1917 was thus $5,156,-09 $5,156,-09 8, which was an increase of nearly 30 per cent over 1915. The increase in the value of domestic natural and artificial abrasives was 3 and 30 per cent in 1915 and 1916, respectively; and the increase in the value of the imports in 1916 was about 3 per cent. The natural abrasives included inclu-ded millstones grindstones, pulp-stones, pulp-stones, oilstones, whetstones, scythe-stones, scythe-stones, rubbing stones, hones, emery, garnet, pumice, tripoli and rotten-stone, rotten-stone, diatomaceous earth, grinding pebbles and tube mill linings. There was an increase in the output of all these products except millstones and diatomaceous earth. One of the features in the year 1916 was the tremendous increase in the domestic output of emery and artificial abrasives, a direct effect of the war which caused a great increase in-crease in the use of these grinding materials and which cut off supplies of emery from Turkey and Greece, thereby further stimulating domestic production. Other noteworthy features, feat-ures, also due to the war, were the first use of domestic beach pebbles for tube mill grinding and the growth of an American industry for the manufacture of flint and quartz-ite quartz-ite blocks for tube mill lining. . a. |
