Date: | 1939 |
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Description: | International PA-100 power unit operating a Pomona water pump in a lead and zinc mine. A box labeled "dynamite" is in the foreground. |
Date: | |
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Description: | A vintage view and a modern view of the zinc works site, presented as a pair. Views include industrial buildings and snow. |
Date: | 1909 |
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Description: | Exterior view of a diamond drill outfit on Presque Isle River. |
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