The 1913 Blue Book misstates the totals for Johnson and Ammann. The 1913 Blue Book also contains mistakes in the county figures for Johnson in Dodge, Grant, and Iowa counties and Ammann in Barron County.
Candidates' party affiliations obtained from the 1913 Blue Book. https://search.library.wisc.edu/digital/ALGTKLQSRXWSF786/full/AI42D4SA6FCG3K8G
Source for Popular Vote data: Wisconsin Board of State Canvassers, "For State Treasurer," Certificate of Board of State Canvassers for State Officers General Election 1912 (Madison, 1912)