1. Chart of the world on Mercator's projection showing the direction of the ocean currents, with the routes and distances between the principal ports Princeton University Public content 1884. Wm. M. Bradley & Bros. In margin: 3. World map on Mercator's projection, showing the route of Challenger Expedition in 1873-1874. Probably issued as plate 3 in: Bradley's... [Philadelphia : Wm. M. Bradley & Bros., 1884?].