Atlantic: ATLANTIC OCEAN. Compiled and Drawn in the Cartographic Section of the National Geographic Society for National Geographic Magazine. John Oliver LaGorce, Editor. Mercator Projection. Scale 1:20,000,000 or 316 miles to the inch at the Equator. Large folded coloured map, 670 by 960 mm; a very good copy. Washington; National Geographic Society; December, 1955.