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Filter: Categories of Wisconsin Historical Images
Filter: Subject of Machinery
Filter: Creator Name of Tvedt, Dean
| Date: | 02 1977 |
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| Description: | A man is standing behind a snow fence next to a surface aerator. Water is pouring down or up the machine, breaking the surface tension of the lake. Snow is... |
| Date: | 02 1977 |
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| Description: | A man is kneeling on the ice and snow at Potter's Lake. He is running a machine that is testing the oxygen levels in the water, while recording the results... |
| Date: | |
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| Description: | A man is operating a drill to connect a house to a water supply. |
| Date: | |
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| Description: | A man is operating a drill to create a well near a home under construction. |
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