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I. THE CLIMATE AND PHYSICAL ASPECTS OF THE EQUATORIAL ZoNE.
The three Climatal Zones of the Earth—Temperature of the Equatorial Zone—Causes of the Uniform High Temperature near the Equator— Influence of the Heat of the Soil–Influence of the Aqueous Vapour of the Atmosphere—Influence of Winds on the Temperature of the Equator —Heat due to the Condensation of Atmospheric Vapour—General Features of the Equatorial Climate—Uniformity of the Equatorial Climate in all Parts of the Globe–Effects of Vegetation on Climate—Short Twilight of the Equatorial Zone—The Aspect of the Equatorial Heavens —Intensity of Meteorological Phenomena at the Equator—Concluding Remarks . . . . . . . . . . . . . . . . . pages 1-26
II. EquaTori AL WEGETATION.
The Equatorial Forest-belt and its Causes—General Features of the Equa- torial Forests—Low-growth Forest-trees—Flowery Trunks and their Probable Cause—Uses of Equatorial Forest-trees—The Climbing Plants of the Equatorial Forests—Palms—Uses of Palm-trees and their Products—Ferns—Ginger-worts and Wild Bananas—Arums—Screw-Pines— Orchids—Bamboos—Uses of the Bamboo-Mangroves—Sensitive-plants —Comparative Scarcity of Flowers—Concluding Remarks on Tropical Vegetation . . . . . . . . . . . . . . . . pages 27–68
III. ANIMAL LIFE IN THE TROPICAL FoRESTs.
Difficulties of the Subject—General Aspect of the Animal Life of Equatorial Forests—Diurnal Lepidoptera or Butterflies—Peculiar Habits of Tropical Butterflies—Ants, Wasps, and Bees—Ants—Special Relations between Ants and Vegetation—Wasps and Bees—Orthoptera and other Insects— Beetles—Wingless Insects—General Observations on Tropical Insects— Birds—Parrots—Pigeons—Picariae—Cuckoos—Trogons, Barbets, Toucans and Hornbills—Passeres—Reptiles and Amphibia—Lizards—Snakes— Frogs and Toads—Mammalia–Monkeys—Bats—Summary of the Aspects of Animal Life in the Tropics. . . . . . . . . pages 69–123
IV. HUMMING-BIRDs : As ILLUSTRATING THE LUxURIANCE of
WI. THE Colours of PLANTS AND THE ORIGIN of THE Colour-SENSE.