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Last edited by RenameBot
September 7, 2008 | History

Harold Hayward Clark

We need a photo of Harold Hayward Clark

Born 1876

14 works Add another?

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

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  • Cover of: Electrical symbols for mine maps

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  • Cover of: Electric lights for use about oil and gas wells

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  • Cover of: Electric switches for use in gaseous mines

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  • Cover of: The factor of safety in mine electrical installations

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  • Cover of: Ignition of gas by miniature electric lamps with tungsten filaments

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  • Cover of: Ignition of gas by standard incandescent lamps

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  • Cover of: Ignition of mine gases by the filaments of incandescent lamps

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  • Cover of: Permissible electric lamps for miners

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  • Cover of: Permissible explosion-proof electric motors for mines: conditions and requirements for test and approval

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  • Cover of: Portable electric mine lamps

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  • Cover of: Safety electric switches for mines

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  • Cover of: Shot firing in coal mines by electricity controlled from outside

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  • Cover of: Suggested safety rules for installing and using electrical equipment in bituminous coal mines

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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