Chart of the world : containing the lines of oceanic mail steam communication and overland routes, the great aerial and submarine telegraphs, and the principal tracks of sailing vessels : showing the direction and mean velocity of oceanic currents and important deep-sea soundings : with 4 additional charts showing the general currents of air, the cotidal lines and the lines of equal magnetic variation / von Hermann Berghaus und Fr. v. Stülpnagel
