Records of Mackintosh-Hemphill Company, 1905-1934.
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Mackintosh-Hemphill Company
http://n2t.net/ark:/99166/w6f81c67 (corporateBody)
In 1859 James Hemphill, W. S. Mackintosh, and W. N. Hart entered into a partnership to purchase a machine shop at the corner of 12th Street and Pike Street in Pittsburgh, Pennsylvania. Their products included steam engines. They subsequently incorporated as Mackintosh-Hemphill Company, Ltd. In 1878 the company purchased the adjoining Fort Pitt Foundry and refitted it for the manufacture of rolling mills for iron and steel makers, including the Bessemer Works in the Homestead section of Pittsburg...