CHAPTER VIII

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THE MEXICAN PLATEAUS, AND THE SLOPES OF SIKKIM.

Geological Formation of Mexico--The _Tierra Caliente_--The _Tierra Templada_--The _Tierra Fria_.

The Sylvan Wonders of Sikkim--Changes of the Forest on ascending-- The Torrid Zone of Vegetation--The Temperate Zone--The Coniferous Belt--Limits of Arboreal Vegetation--Animal Life 79

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