North America River St. Lawrence Montreal to Ogden Island Montreal to Lachine Rapids, from a Survey by Captain H. W. Bayfield, R. N. 1858 St. Regis to Ogden Island from the United States Government Survey 1871-3 Magnetic Variation in 1912, increasing about 1' annually. Soundings in Feet. Reduced to ordinary ...
North America River St. Lawrence Montreal to Ogden Island Montreal to Lachine ...