founded upon a trigonometrical survey under the direction of F.R. Hassler, superintendent of the Survey of the Coast of the United States. 1 map ; 59 x 87 cm. Scale 1:80,000 (W 75⁰19ʹ--W 75⁰29ʹ/N 40⁰45ʹ--N 40⁰18ʹ). Relief shown by hachures; depths shown by soundings. Includes text, table of currents, notes and 4 coastal panoramas. Longitude also given "from the Meridian of New York City Hall."