6 CONTENTS. 
Distribution of corundum — Continued. 
Emery . . _ 
Massachusetts . .__... 
New York ..:.___ .. . _ . .__ 
North Carolina 
Methods of mining corundum 7i 
Methods of cleaning corundum 7- 
Uses of corundum . _ _ 7' 
Vitrified wheel _. 71 
Chemical wheel _ . _ _ 71 
Cement wheel ... 71 
Other uses _ _ . . . . . . . 
Corundum localities in the United States 
Alabama 
California . _ 
Colorado . 
Connecticut 
Delaware ... .... _. 
Georgia 
Maryland 
Massachusetts 
Montana 
Nevada _ . 
New Jersey _ .._._. . 
New York . 
North Carolina _._ ... 
Pennsylvania . . . . 
South Carolina . 
Utah 
Virginia ... ..... 
Alaska _ . . ._.... . 
Corundum localities in foreign countries 
Canada ...._. 
India _ 
Turkey 
Grecian Archipelago . . 
Other localities. . 
