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More by Harold Hayward Clark
Icon image Electrical Symbols for Mine Maps
Electrical Symbols for Mine Maps
€0
Icon image Electric Lights for Use about Oil and Gas Wells
Electric Lights for Use about Oil and Gas Wells
€0
Icon image Permissible Explosion-proof Electric Motors for Mines: Conditions and Requirements for Test and Approval
Permissible Explosion-proof Electric Motors for Mines: Conditions and Requirements for Test and Approval
€0
Icon image Safety Electric Switches for Mines
Safety Electric Switches for Mines
€0
Icon image The Factor of Safety in Mine Electrical Installations
The Factor of Safety in Mine Electrical Installations
€0
Icon image An Investigation of Explosion-proof Motors: Volumes 43-49
An Investigation of Explosion-proof Motors: Volumes 43-49
€0
Icon image The Electrical Section of the Bureau of Mines: Its Purpose and Equipment
The Electrical Section of the Bureau of Mines: Its Purpose and Equipment
€0
Icon image Ignition of Gas by Standard Incandescent Lamps
Ignition of Gas by Standard Incandescent Lamps
€0
Icon image Portable Electric Mine Lamps
Portable Electric Mine Lamps
€0
Icon image Ignition of Gas by Miniature Electric Lamps with Tungsten Filaments
Ignition of Gas by Miniature Electric Lamps with Tungsten Filaments
€0
Icon image Suggested Safety Rules for Installing and Using Electrical Equipment in Bituminous Coal Mines
Suggested Safety Rules for Installing and Using Electrical Equipment in Bituminous Coal Mines
€0
Icon image Shot Firing in Coal Mines by Electricity Controlled from Outside
Shot Firing in Coal Mines by Electricity Controlled from Outside
€0
Icon image Coal-mine Accidents in the United States and Foreign Countries: Issues 66-72
Coal-mine Accidents in the United States and Foreign Countries: Issues 66-72
€0
Icon image Sand Available for Filling Mine Workings in the Northern Anthracite Basin of Pennsylvania
Sand Available for Filling Mine Workings in the Northern Anthracite Basin of Pennsylvania
€0
Icon image The Wet Thiogen Process for Recovering Sulphur from Sulphur Dioxide in Smelter Gases: A Critical Study, Issues 131-140
The Wet Thiogen Process for Recovering Sulphur from Sulphur Dioxide in Smelter Gases: A Critical Study, Issues 131-140
€0
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