Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York : D. Appleton & company · leaf 119
hebird (as at present constructed) destined to navigate the air,,and levity to that destined to navigate the water. If a birdwas made very large and very light, it is obvious that thediving force at its disposal would be inadequate to submergeit. If, again, it was made very small and very heavy, it… … 3> R 9 « v< i. •,= - > •- — S >> Ift.?y11*SeH~~ cS Ho o.? c^^ ^ ^ -- £ £ & t ;•? l|J*SaijA t ^ifs^-s^- !ii?tf3] I^8|l§S c = = £ s t S — a> - tr-* is IP S i - ~ — ~ - <2 < which flies in the air, and has curtailed the travelling surfacesof the fonnL-r, while she has…
Animal locomotion · Aeronautics
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