Public Domain Books (pdbooks.info)Public Domain Books

H. H. (Harold Hayward) Clark

Clark, H. H. (Harold Hayward), 1876–

Nationality: Undetermined, possibly United States (United States)

Identities and Authority Control

H. H. (Harold Hayward) Clark Contributed to the Following:

TitleEditionYear of PublicationRoleCountry of PublicationPossible Copyright StatusAvailable Online?
Electric lights for use about oil and gas wells1914AuthorUnited StatesPublic DomainPublic DomainUnknown copyright statusUnknown copyright statusPage view available
Electric switches for use in gaseous mines1913AuthorUnited StatesPublic DomainPublic DomainUnknown copyright statusUnknown copyright status
The electrical section of the Bureau of mines1911AuthorUnited StatesPublic DomainPublic DomainUnknown copyright statusUnknown copyright statusPage view available
Electrical symbols for mine maps1913AuthorUnited StatesPublic DomainPublic DomainUnknown copyright statusUnknown copyright status
The factor of safety in mine electrical installations1912AuthorUnited StatesPublic DomainPublic DomainUnknown copyright statusUnknown copyright statusPage view available
Ignition of gas by miniature electric lamps with tungsten filaments1912AuthorUnited StatesPublic DomainPublic DomainUnknown copyright statusUnknown copyright statusPage view available
Ignition of gas by standard incandescent lamps1912AuthorUnited StatesPublic DomainPublic DomainUnknown copyright statusUnknown copyright statusPage view available
Ignition of mine gases by the filaments of incandescent lamps1913AuthorUnited StatesPublic DomainPublic DomainUnknown copyright statusUnknown copyright status
Permissible electric lamps for miners1914AuthorUnited StatesPublic DomainPublic DomainUnknown copyright statusUnknown copyright statusPage view available
Permissible explosion-proof electric motors for mines; conditions and requirements for test and approval1915AuthorUnited StatesPublic DomainPublic DomainUnknown copyright statusUnknown copyright statusPage view available
Portable electric mine lamps1913AuthorUnited StatesPublic DomainPublic DomainUnknown copyright statusUnknown copyright statusPage view available
Safety electric switches for mines1913AuthorUnited StatesPublic DomainPublic DomainUnknown copyright statusUnknown copyright statusPage view available
Shot firing in coal mines by electricity controlled from outside1915AuthorUnited StatesPublic DomainPublic DomainUnknown copyright statusUnknown copyright statusPage view available
Suggested safety rules for installing and using electrical equipment in bituminous coal mines1916AuthorUnited StatesPublic DomainPublic DomainUnknown copyright statusUnknown copyright statusPage view available
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