CHAPTER VIII. THE EARTH’S BEGINNING. The Earth\'s Beginning

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CHAPTER VIII. THE EARTH’S BEGINNING.

The Earth to be Studied—A great Experiment—The Diamond Drill—A Boring upwards of a Mile Deep—A Mechanical Feat—The Scientific Importance of the Work—Increase of Temperature with the Depth—A special Form of Thermometer—Taking the Temperature in the Boring—The Level of Constant Temperature—The Rate of Increase of Temperature with the Depth—One degree Fahrenheit for every Sixty-six Feet ............

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(Left Keyword <-) Previous: CHAPTER VII. THE HISTORY OF THE SUN. Back Next: CHAPTER IX. EARTHQUAKES AND VOLCANOES. (Right Keyword:->)

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