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Updated: May 22, 2025
When the Carboniferous was ended the waste which had been removed from the land and laid along its margin in the successive formations of the Paleozoic had reached a thickness of between thirty and forty thousand feet. Both by sedimentation and by subsidence the trough had now become a belt of weakness in the crust of the earth.
Drinking water may be purified by aëration, or by straining, boiling and subsequent sedimentation and removal of the sediment by filtration through fresh and clean sand. For the wealthy, the water may be distilled in an alembic, if such an apparatus is obtainable. Avicenna says that bad water may be corrected by the addition of vinegar.
Nature's best use for genius is to make other men think; to stir things up so sedimentation does not take place; to break the ankylosis of self-complacency; and start the stream of public opinion running so it will purify itself. Burke was an agitator not a leader. He had the great gift of exaggeration, without which no man can be a great orator.
They determine the various agencies which are to be chiefly concerned m the wear of any land, whether streams or glaciers, weathering or the wind, and the degree of their efficiency. The lands must be uplifted before they can be eroded, and since they must be eroded before their waste can be deposited, movements of elevation are a prerequisite condition for sedimentation also.
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