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Filter: Subject of environmental protection
| Date: | 1875 |
|---|---|
| Description: | Head and shoulders oval framed portrait of John Muir (1838-1914). |
| Date: | 1899 |
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| Description: | A studio portrait of naturalist, conservationist, and writer John Muir. |
| Date: | 1978 |
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| Description: | Students at Wausau West High School involved in an innovative science project that studied energy consumption and pollution of the Wisconsin River. |
| Date: | 07 18 1955 |
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| Description: | Five teen boys stand ankle deep in Black Earth Creek (west of Cross Plains) while working together to build a conversion dam in the creek bed. The boys are... |
| Date: | 07 18 1955 |
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| Description: | Three teen boys work together to build up the side of the creek to stop the flowing water from washing the soil away on an edge of Black Earth Creek west o... |
| Date: | 10 1978 |
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| Description: | Two men are standing on the rocky shoreline of the Sheboygan River. One man is holding a shovel in his right hand and a glass jar in his left hand. The oth... |
| Date: | 10 1978 |
|---|---|
| Description: | Two men are kneeling on the ground. One man is holding a shovel while the other man is scooping dirt from the shovel into a glass jar. They are measuring P... |
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