ter the earth had assumed its presentform. But if the glacial epoch was before the appearance ofanimal life upon the earth, then it must have been duringthe azoic age or before it; and there can be no evidence of auniversal glacial epoch in these formations succeeding theazoic, since they would all… … figures. With the same radius, on A as a center, cut thecircle in C and D. Draw C D, and produce it to B, makingC E, equal to three times C D. Divide C E into as many equal
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