Clays and clay industries of Pennsylvania. I. Clays of western Pennsylvania (in part). Description of the clays and clay industries in the Ohio, Monongahela, Youghiogheny ad Conemaugh river valleys in Pennsylvania, and the Allegheny valley as far up as Kittanning, including Allegheny, Westmoreland and Fayette counties and parts of Beaver, Washington, Greene, Indiana, Armstrong and Cambria counties., by Thomas Cramer Hopkins

Title:	Clays and clay industries of Pennsylvania. I. Clays of western Pennsylvania (in part). Description of the clays and clay industries in the Ohio, Monongahela, Youghiogheny ad Conemaugh river valleys in Pennsylvania, and the Allegheny valley as far up as Kittanning, including Allegheny, Westmoreland and Fayette counties and parts of Beaver, Washington, Greene, Indiana, Armstrong and Cambria counties.
Author:	Hopkins, Thomas Cramer, 1861-
Note:	W. S. Ray, state printer, 1898

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Subject:	Bricks
Subject:	Clay industries -- Pennsylvania
Subject:	Clay -- Pennsylvania
Subject:	Pottery -- Pennsylvania
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