In several parts of the world there is no rain at all. In the Old World
there are two districts of this kind: the desert of Sahara in Africa,
and in Asia part of Arabia, Syria, and Persia; the other district lies
between north latitude 30° and 50°, and between 75° and 118° of east
longitude, including Thibet, Gobiar Shama, and Mongolia. In the New
World the rainless districts are of much less magnitude, occupying two
narrow strips on the shores of Peru and Bolivia, and on the coast of
Mexico and Guatemala, with a small district between Trinidad and Panama
on the coast of Venezuela.