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Keuffel and Esser Portland Cement linear slide rule
Named collection: Keuffel & Esser Company Collection
Object type: slide rule
Maker: Keuffel & Esser Co.
Place made: United States, New York
Materials: wood; metal; celluloid
Measurements: 1/4 in x 10 1/2 in x 1 1/4 in
For calculating ratios of Portland cement raw materials.
Keuffel & Esser Company Slide Rule Collection Donated by InteliCoat Technologies