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| Date: | 1928 |
|---|---|
| Description: | Crowd seated on the lawn of Agriculture Hall on the University of Wisconsin-Madison for a ceremony honoring S.M. Babcock, inventor of the butter test. |
| Date: | 1925 |
|---|---|
| Description: | Photographic illustration of two men cutting wood with a saw powered by horses on a treadmill. The horses and treadmill were added by an artist's drawing. |
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