John Givan Davis Mack | |
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| Born | September 5, 1867 Terre Haute, Indiana |
| Died | February 24, 1924 (aged 56) Madison, Wisconsin |
| Education | Cornell University |
| Occupation(s) | Engineer, professor, curator |
| Employer | University of Wisconsin |
John Givan Davis Mack (September 5, 1867 – February 24, 1924) was a professor of engineering at the University of Wisconsin. He was also curator of the museum of the Wisconsin Historical Society. He was for many years State Chief Engineer.