Search the Wisconsin Historical Society's collections
Filter: Categories of Wisconsin Historical Images
Filter: Subject of Inventions
Filter: Subject of machinery
| Date: | 02 22 1950 |
|---|---|
| Description: | An example of a pilot plant to remove phosphorus from sewage effluent by engineering professors William L. Lea and Gerard A. Rohlich. |
| Date: | 1931 |
|---|---|
| Description: | Advertising poster for the "Romance of the Reaper" film for use in Australia. The poster features an illustration of Cyrus Hall McCormick building the firs... |
| Date: | |
|---|---|
| Description: | A man is standing on the left next to an outhouse which has been connected to machinery. The caption below reads: "This built in service unit increased our... |
If you didn't find the material you searched for, our Library Reference Staff can help.
Call our reference desk at 608-264-6535 or email us at: