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The

STORY OF SLATE

 

By Charles H. Davis

President, Davis Slate & Manufacturing Company

CHICAGO

Director, National Slate Association, Philadelphia

 

 

 

A LECTURE MR. DAVIS DELIVERED BEFORE THE COMMERCIAL GEOGRAPHY CLASSES OF THE UNIVERSITY OF CHICAGO, NORTHWESTERN UNIVERSITY AND THE CHICAGO HIGH SCHOOLS. PUBLISHED IN PRINTED FORM IN RESPONSE TO NUMEROUS REQUESTS FOR COPIES.