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: | 1925 |
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Description: | View down railroad tracks towards large mounds of raw material at National Zinc Separating Company plant. Industrial buildings and a railroad car and an au... |
Date: | 1925 |
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Description: | View down railroad tracks of the National Zinc Separating Company grounds. There is a large mound of ores, railroad cars, industrial buildings and a tall b... |
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