Harold Hayward Clark
Born 1876-01-01
Identifiers
- Open LibraryOL2389237A
Top Subjects
- Electricity in mining (9)
- Incandescent lamps -- Testing (3)
- Mine lighting (2)
- Electric switchgear (2)
- Electric lamps, Portable (2)
- United States. Bureau of Mines (1)
- Coal mines and mining (1)
Books by Harold Hayward Clark
Total count: 14
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The electrical section of the Bureau of minesGovt. print. off.1911-01-01
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The factor of safety in mine electrical installationsGovt. print. off.1912-01-01
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Ignition of gas by miniature electric lamps with tungsten filamentsGovt. print. off.1912-01-01
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Ignition of gas by standard incandescent lampsGovt. print. off.1912-01-01
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Electric switches for use in gaseous minesGovt. Print. Off.1913-01-01
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Electrical symbols for mine maps[2d ed.]Govt. print. off.1913-01-01
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Safety electric switches for minesGovt. print. off.1913-01-01
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Portable electric mine lampsGovt. print. off.1913-01-01
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Ignition of mine gases by the filaments of incandescent lampsGovt. Print. Off.1913-01-01
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Permissible electric lamps for minersGovt. Print. Off.1914-01-01
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Electric lights for use about oil and gas wellsGovt. Print. Off.1914-01-01
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Shot firing in coal mines by electricity controlled from outsideGovt. Print. Off.1915-01-01
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Permissible explosion-proof electric motors for minesconditions and requirements for test and approvalGovt. Print. Off.1915-01-01
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Suggested safety rules for installing and using electrical equipment in bituminous coal minesGovt. print. off.1916-01-01