Aldrich, Thomas Bailey, 1836-1907 · Boston, CT : Hall and Locke · leaf 175
of its body on the atmosphere maycounterbalance its gravity. The force to keep up themomentum of a body moving in a horizontal plane in theair (in which there is so little friction) cannot be great,and this force is all that is wanted. The movement ofthe neck and body of the condor, we must…
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