Excerpt from Physics of the Earth's Crust This increase of temperature, though universal, is not every where the same. The average is about 1 degree F ahr. For 50 feet of descent. Such is the result of very numerous observations. Some of these have been made by drilling holes in the rock in deep mines; others by lowering thermometers in artesian bore-holes. A committee was appointed by the British Association to report upon the subject, and their reports extend from the year 1869. Much information upon the matter may also ...
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Excerpt from Physics of the Earth's Crust This increase of temperature, though universal, is not every where the same. The average is about 1 degree F ahr. For 50 feet of descent. Such is the result of very numerous observations. Some of these have been made by drilling holes in the rock in deep mines; others by lowering thermometers in artesian bore-holes. A committee was appointed by the British Association to report upon the subject, and their reports extend from the year 1869. Much information upon the matter may also be gathered from the Reports of the Parliamentary Com mission upon the Coal Supply. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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