Unknown County, SD History - Books .....Abrasives 1925
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Joy Fisher sdgenweb@yahoo.com March 25, 2007, 11:33 am

Book Title: Doane Robinson's Encyclopedia Of South Dakota

  Abrasives. South Dakota has considerable resources in the materials for
abrasives; these, in the order of quantity, are quartz, corundum and garnet. The
quartz most practicable for use is found chiefly in the Black Hills; corundum is
secured by process from the alumnia of the shales, and the supply is
inexhaustible. Garnet is found in limited quantities in the Black Hills.

Additional Comments:
Extracted from:

DOANE ROBINSON'S
Encyclopedia of South Dakota
FIRST EDITION

Published by the Author
PIERRE
1925

COPYRIGHT BY DOANE ROBINSON. 1925

WILL A. BEACH PRINTING COMPANY
PRINTERS AND BINDERS
SIOUX FALLS



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