Constitution and By-Laws of Minnesota Academy of Natural Sciences; With Address of President, List of Officers and Committees for 1873

Constitution and By-Laws of Minnesota Academy of Natural Sciences; With Address of President, List of Officers and Committees for 1873

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1873 edition. Excerpt: ...V This instrument must be much older than the red clay above. Now, gentlemen, suppose the etching of the inscription to have been one line in depth, and filled up, and suppose the whole depth of the stalagmitic floor to have been formed at the same rate, and we shall find 314,496 years have passed since the floor commenced to form. I have observed hundreds of inscriptions made by ambitious youths and vain tourists upon sand rock and limestone ledges that were not a twenty-fourth part of an inch deep, and the inscriptions found upon stones, horns and bones of the cave dwellers were not half a line deep, and oft@ not more than a fourth of a line deep. Now, suppose the figures I688 on the stalagmite floor of Kent's cavern to have been the usual depth of those now found on the sand rock at Minnehaha Falls, and_ at many other places on the river banks, and we have a period of 628,992 years since the stalagmite commenced to be laid down. All beneath this floor, must have been there, when the stalagmite began to be deposited, and, therefore, very much older. Man in the Glacial Epoch.---We have seen that Lyell states that the extinct animals existed in preglacial times, and survived the period of intense cold; that Foster, Leidy and others support this conclusion. We have also presented many facts, out of the vast multitude, which show that man and the extinct animals existed together in that epoch. " Towards the commencement," says Figuier, "of the quaternary epoch, a great natural phenomenon took place in Europe, under the influence of numerous and varied causes, which, up to the present time have not beenifully recognized, agreat portion of Europe became covered with ice, on the one hand, making its way from the poles down to...show more

Product details

  • Paperback | 90 pages
  • 189 x 246 x 5mm | 177g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236960351
  • 9781236960351