1. Map of the territories of Michigan and Ouisconsin on a scale of 30 geographical miles to an inch by John Farmer of Detroit, Engraved by Rawdon Clark & Co., Albany, NY. Yale Public content 1830. 2008-07-02T12:56:40Z. 2020-06-15T15:45:17Z. John Farmer,. English. Public. East (U.S.) and Canada.