High-quality black-and-white photographs of large old machines and tools

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ROTARY PLATE SHEAR IN STAINLESS PROCESSING BUILDING - U.S. Steel Homestead Works, Stainless Steel Processing Plant, Along Monongahela River, Homestead, Allegheny County, PA

Significance: As a group, the structures and steel-making equipment from Homestead Works represented one of the nation's most important steel mills and the Mon Valley's status as the pre-eminent iron and steel center in the United States for much of the nineteenth and twentieth centuries.

Click an image below for a fullsize jpg, or get the 19MB tifs from the Library of Congress:

19MB tif of first image from the Library of Congress website
19MB tif of second image from the Library of Congress website