Works Translated Into English Under the Editorship of W. D. Ross Volume 5

Works Translated Into English Under the Editorship of W. D. Ross Volume 5

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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. 1912 edition. Excerpt: ...are his legs. The brachylogy is easier in Greek because isosceles means ' with equal legs'. B C ' iliilirrrao-is-, cf. H.A. 4871' 22; telescopic suggests the movement of earthworms, which is concertina-like. L. and S. wrongly translate 'wriggling ', which is not a worm's normal movement. A.'s account of the fact is characteristically accurate; characteristically too he does not ask how it squares with his theory of movement. _ 5 Viz. the two arcs are together greater than the chord which subtends them. / the flexure or arc were equal to the chord subtended; as it is, it reaches further when it is straightened out, and then this part stays still and it draws up what is left behind. In all the changes described that which moves now 5 extends itself in a straight line to progress, and now is hooped; it straightens itself in its leading part, and is hooped in what follows behind. Even jumping animals all make a flexion in the part of the body which is underneath, ' and after this fashion make their leaps. So too flying IO and swimming" things progress, the one straightening and bending their wings to fly, the other their fins to swim. Of the latter some have four fins," others which are rather long, for example eels, have only two. These swim by substituting a flexion of the rest of their body for the (missing) pair of fins to complete the movement, as we 15 have said before.' Flat fish use two fins, and the flat of their body as a substitute for the absent pair of fins.' Quite flat fish, like the Ray," produce their swimming movement with the actual fins and with the two extremes or semicircles of their body, bending and straightening themselves alternately. 1...show more

Product details

  • Paperback | 214 pages
  • 189 x 246 x 11mm | 390g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236781236
  • 9781236781239