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CHAP. IX. | |
MODERN EFFECTS OF HEAT ON THE GLOBE. | |
Page | |
Remarks | 200 |
Volcanic Action | 201 |
Origin of Volcanos | 202 |
Volcanos in Action | 208 |
Dispersion of Ashes, Stones, Mud, &c. | 213 |
Extinction of Volcanos | 216 |
Extinct Volcanos | 220 |
Geographical Distribution of Volcanos. | 221 |
Asiatic Volcanos | 227 |
American Volcanos | 229 |
African Volcanos | 231 |
Australian | 232 |
Indian Ocean | 232 |
Pacific Ocean | 232 |
Geological Age of Volcanos | 233 |
Volcanic Eruption Forces.─Earthquakes | 234 |
Ejection of Ashes and Stones | 235 |
New Mountains formed | 236 |
New Islands raised | 236 |
Earthquakes | 242 |
Hypotheses of Volcanic Action | 248 |
Thermal Springs | 252 |
Warm Springs of the British Islands, yielding Nitrogen, &c. | 255 |
Warm Springs of a Part of Germany, &c., yielding Carbonic Acid, &c. | 256 |
Warm Springs of the Pyrenees | 256 |
Warm Springs of Volcanic Countries | 257 |
Summary of their Geological Relations to existing Volcanos | 259 |
Experimental Inquiries into the Heat of the Globe | 262 |
First Class of Experiments.—Metalliferous Veins | 270 |
Tables of Temperatures of Water at different Depths in the Mines of Freyberg | 270 |
Account of Temperatures of Water at different Depths in various Countries | 271 |
Second Class of Experiments.—Stratified Rocks | 272 |
Account of the Temperatures of Water at various Depths in different Mines | 273 |
Cordier's Summary of Observations in the Coal Mines of Carmeaux, Littry, and Decise | 274 |
Summary of Observations on Subterranean Temperatures in Rocks | 275 |
Third Class of Experiments.—Artesian Wells | 276 |
Tables of Temperatures of Water, with Mean Results | 276 |