Map of North-West Canada; circa 1788. 1: 7300000 approx. 鈥楪eographical miles 60 to a degree'. Scale bar of 500 miles (= 5 inches). However a second scale 鈥楤ritish statute miles; 691/2 to a degree'; scale bar of 600 miles (= 5 inches) indicates a figure closer to 1: 7600000.18th century.From: R.U.S.I. MAPS. Vol. LXXIII (1-13).Add. 57708 f. 14London; British Library.
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