Relief shown by hachures. "Entered according to act of Congress in the year 1855 by J. H. Colton &amp; Co. ... New York." Prime meridians: Greenwich and Washington. Differs from plate 33 of 1860 edition of Colton's general atlas, containing one hundred and eighty steel plate maps and plans on one hundred imperial folio sheets, only in publisher's statement . At lower right: No. 33. Available also through the Library of Congress Web site as a raster image.
J.H. Colton &amp; Co.; Johnson &amp; Browning
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