I. Copy of a Letter from Professor Fuss, Perpetual Secretary of the Imperial Academy of Sciences at St. Petersburg, to the Baron Berzelius, Perpetual Secretary of the Royal Academy of Sciences at Stockholm, on the contemplated extension of the Swedish Arc of Meridian, from its northern extremity at Pahtawara to the North Cape; with a Letter from Capt. Sir John Ross, R.N., to Dr. Lee
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