(MI-81-42) N. of Ann Arbor, Northfield Township, Washtenaw County, MI. Whitmore Lake Rd. N. 2.8 miles from jct with Bus.US23 on the N. side of Ann Arbor, W. on Joy Rd. 0.1 miles to the bldg on the N. side of the road at 100. (12-15-07, N42 20.68 W83 45.20) Photos by Mark Comstock & Joan Berman.