North American Lakes Lake Superior The Canadian Shore from the Admiralty Survey by Lieut't H. W. Bayfield, r. N., 1823-5 The Coast and Plans of the United States from the United States Government Surveys of 1855-72. ... Magnetic Variation in 1883; Westerly increasing, Easterly decreasing about 4' annually. All bearings ...
North American Lakes Lake Superior The Canadian Shore from the Admiralty Survey ...