The Earth: Its Physical Condition and Most Remarkable PhenomenaHarper, 1839 - 408 pages |
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action active agent angle of incidence animals appearance atmosphere atmospheric electricity attraction beds bones called carbonic acid causes centrifugal force character chymical circumstances clouds coal measures colour considerable contains crust deduced deposites depth determine direction distance district diurnal earth earthquakes effects ejected electricity elevation equator eruption evidence existence experiments fact fall feet fluid force formation formed frequently geologists granite heat height hemisphere horizon hyænas ichthyosaurus increase influence instances intensity intumescent islands lakes land lava less light liquid magnetic mass metallic miles mineral moon motion mountain nature northern hemisphere observed ocean opinion parhelia particles passes period phenomena phenomenon philosophers plesiosaurus poles position present principle produced PTERODACTYLUS quantity rays refraction remarkable result rivers sensible heat situated solar sometimes south pole strata stratified rocks substances supposed surface temperature terrestrial theory tion tricity valleys vapour variation vegetable veins violent volcanic