Search the Wisconsin Historical Society's collections
Filter: Categories of Wisconsin Historical Images
Filter: Subject of Public service employment
Filter: Subject of science
| Date: | 01 15 1959 |
|---|---|
| Description: | A man is putting an 8 x 10 filter into an envelope to be sent to "a U.S. Public Health Service laboratory in Cincinnati for analysis". The filter changed f... |
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: