Mercer, H.T.

Report on Oil Storage System at Calumet and Hecla Mine

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Profile on a Line S39ø-30øW From DD Hole 86 to a Point Near DD Hole 58, Unknown Location

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Assembly of Man Car Winch Plans

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Baltic Oil House Plans

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Champion Copper Company Illumination Tests on Candles and Sunshine

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Trimountain Mine Number 2 Shaft Details of Steel Collar Drawing

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Letter to B. D. Noetzel from H.T. Mercer

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Letters between H.T. Mercer (Champion Copper Company) and the A.H. Andrews Company

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