North American Lakes River St. Lawrence Quebec to Kingston with Lake Ontario and Lake Champlain From the latest British and United States Government Surveys, 1876 ... Magnetic Variation in 1880; increasing about 4' annually. All bearings are Magnetic Soundings in Fathoms London. Published at the Admiralty, 20th Jan'y 1880, under ...
North American Lakes River St. Lawrence Quebec to Kingston with Lake Ontario ...