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Last edited by RenameBot
September 7, 2008 | History
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Harold Hayward Clark

We need a photo of Harold Hayward Clark

Born 1876

14 works Add another?

  • Cover of: The electrical section of the Bureau of mines

    First published in 1911 — 1 edition
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  • Cover of: Electrical symbols for mine maps

    First published in 1913 — 1 edition
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  • Cover of: Electric lights for use about oil and gas wells

    First published in 1914 — 1 edition
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  • Cover of: Electric switches for use in gaseous mines

    First published in 1913 — 1 edition
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  • Cover of: The factor of safety in mine electrical installations

    First published in 1912 — 1 edition
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  • Cover of: Ignition of gas by miniature electric lamps with tungsten filaments

    First published in 1912 — 1 edition
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  • Cover of: Ignition of gas by standard incandescent lamps

    First published in 1912 — 1 edition
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  • Cover of: Ignition of mine gases by the filaments of incandescent lamps

    First published in 1913 — 1 edition
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  • Cover of: Permissible electric lamps for miners

    First published in 1914 — 1 edition
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  • Cover of: Permissible explosion-proof electric motors for mines: conditions and requirements for test and approval

    First published in 1915 — 1 edition
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  • Cover of: Portable electric mine lamps

    First published in 1913 — 1 edition
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  • Cover of: Safety electric switches for mines

    First published in 1913 — 1 edition
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  • Cover of: Shot firing in coal mines by electricity controlled from outside

    First published in 1915 — 1 edition
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  • Cover of: Suggested safety rules for installing and using electrical equipment in bituminous coal mines

    First published in 1916 — 1 edition
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We need a photo of Harold Hayward Clark

Born 1876

Subjects

Electricity in mining, Incandescent lamps, Testing, Coal mines and mining, Electric switchgear, Mine lighting, Portable Electric lamps, Electric motors, Safety measures, United States, United States. Bureau of Mines

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ID Numbers

  • OLID: OL2389237A

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History

Download catalog record: RDF / JSON
September 7, 2008 Edited by RenameBot fix author name
April 1, 2008 Created by an anonymous user initial import