Contributions from the Zoological Laboratory Volume 1

Contributions from the Zoological Laboratory Volume 1

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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. 1893 edition. Excerpt: ...S1( 22 or 23, as the case may be. In other words, a new resultant of the interacting energies will be produced every time that 2 or C is varied. This variation in the mode of dissipation of energy must react upon the figure of the organism, as was proved or rendered self-evident for the very simple case of Amoeba proteus in the preceding paper. In this way only is it conceivable that variations of form could arise that were in a condition of dynamical adjustment of function in relation to outer conditions. In other words, "natural selection," robbed of its metaphorical sound, is only another way of expressing the fact that a dynamical process of adjustment has been successful. In this way, also, it becomes possible to bring the processes of evolution under the domination of the great principle of the conservation of energy. Viewed in this way, "heredity" itself is only an effect and is at last dominated and directed in its onward or progressive complication by the laws of the conservation of energy. The progressive or superpositional, substitutional steps of morphological evolution are a further and capital proof of this conclusion. What the mechanism of heredity is, or what the laws and causes of its operation are, remains to be discovered by an elaborate and connected study of the phenomena of organic growth and the mechanisms and correlations of the same, and not by the assumption of the existence of unknowable as well as undiscoverable gemmules, plastidules, germ-plasms, etc. Such devices will unquestionably be consigned in due time to the same limbo as has befallen astrology, alchemy and the doctrine of signatures. The physical basis of life is admittedly very different in different beings, but this does not...show more

Product details

  • Paperback | 34 pages
  • 189 x 246 x 2mm | 82g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236739183
  • 9781236739186