A map of the major drainage basins of the African continent indicating the hydrologic flow to the Atlantic and Gulf of Guinea, the Mediterranean, the Red Sea and Indian Ocean, and the interior basins of the Sahara and Kalahari deserts...

A map from 1898 of the Heat Belts in South America showing the Heat Equator in July, regions where it is always hot, regions of temperate winters and hot summers, and regions where it is always temperate. "There is comparatively little...

A map from 1901 of the Heat Belts in South America showing the Heat Equator in July, regions where it is always hot, regions of temperate winters and hot summers, and regions where it is always temperate. "There is comparatively little...

A map from 1898 of North America, Central America, Greenland, and the Caribbean to Puerto Rico showing the general distribution of rainfall in the region. The map shows areas of little or no rainfall to areas of heavy rainfall. The map...