Penn Chemical Works (Campo Seco, Calif.) Essay Records, 1912-1919

Summary

Title:

Penn Chemical Works (Campo Seco, Calif.) Assay Records,

Dates:

1912-1919

Creators:

Language:

English.

Preferred citation:

[Identification of item], Penn Chemical Works (Campo Seco, Calif.) Assay Records, Mss14, Holt-Atherton Department of Special Collections, University of the Pacific Library

Background

Scope and content:

This collection consists of pages of unbound printed forms on which daily assay samples are recorded, giving the percentages of copper, iron, etc. in each sample. Since the period covered by these records includes the World War I years, the data displayed may show an increase in mining activity in response to war needs.

Biographical / historical:

Campo Seco, eight miles southwest of Mokelumne Hill in Calaveras County prospered briefly as a gold mining camp (1850-1860), but in later years was known principally for its production of copper and zinc, most notably from the Penn Mine. In 1887 the Penn Chemical Co. acquired a mining site and erected a smelter (1899) which served the Penn mines through 1919. The smelter was equipped with a crushing and grinding plant, eight roasting furnaces and a blast furnace. The smelter was shut down and dismantled when the price of copper declined following World War I. Gross returns from the smelting operation exceeded $7 million.

Physical location:

For current information on the location of these materials, please consult the library's online catalog.

Physical description:

0.5 linear ft.

About this collection guide

Collection Guide Author:

Processed by Don Walker; machine-readable finding aid created by Don Walker

Date Prepared:

© 1998

Date Encoded:

Machine-readable finding aid derived from paper by means of scanning and OCR; OCR file edited for typographical errors before encoding. Date of source: 5-98.

Restrictions:

Collection is open for research.

Preferred citation:

[Identification of item], Penn Chemical Works (Campo Seco, Calif.) Assay Records, Mss14, Holt-Atherton Department of Special Collections, University of the Pacific Library

Location of this collection:

University of the Pacific

University of the Pacific, Holt-Atherton Department of Special Collections, University Library

Stockton, CA 95211, US

Contact:

(209) 946-2404

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