. A regional geography of the world, with diagrams and entirely new maps . e hot belt of the world,approximately the inter-tropical lands, although theseregions extend beyond the actual tropics. (a) Equatorial Types. The first group of regions comprises the north-westcoastal margins of South America, portions of theAmazon and Congo Basins, of the coastlands of Westand ICast Africa and the greater part of the East this group of regions wc shall give the nameEquatorial Type. REGIONS IN MOT LANDS 5 Let us now discover upon what grounds these regionsmay be grouped together. In the first
. A regional geography of the world, with diagrams and entirely new maps . e hot belt of the world,approximately the inter-tropical lands, although theseregions extend beyond the actual tropics. (a) Equatorial Types. The first group of regions comprises the north-westcoastal margins of South America, portions of theAmazon and Congo Basins, of the coastlands of Westand ICast Africa and the greater part of the East this group of regions wc shall give the nameEquatorial Type. REGIONS IN MOT LANDS 5 Let us now discover upon what grounds these regionsmay be grouped together. In the first place, they areall iocated in equatorial regions. Because of this the noonelevation of the sun is never very far from the zeniththroughout the year, so that the temperature conditionsare uniformly high and equable (Figs. 3, 6 and 7).^Moreover, it is in this Doldrums belt that the upwardmovement of air caused by the meeting of the trade windsresults in rainfall at all seasons (Figs. 14, 15 and 16),although it will be recalled that equatorial lands have March 21^ JxmeZP^. ^Fig. 2.—Diagram showing the position of the earth with regardto the sun at the equinoxes and solstices. two relatively wet and tvyo relatively dry seasons, owingto the migration of the belts of pressure and winds,which is in turn produced by the migration of thevertical sun north and south of the Equator. All theseclimatic factors affect the character of the naturalvegetation, which, over the greater part of these regions,consists of equatorial forests, remarkable both for theintense struggle for light and air which goes on within ^ Maps and diagrams showing the distribution of temperature,pressure, rainfall, natural vegetation, etc., will be found, in theirproper sequence, spread out throughout this part of the book. Itis intended that they should be referred to constantly in order tocheck statements made in the text. They are taken from Book IIIin this series. 6 MAJOR NATURAL REGIONS OF WORLD them,
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