 Certainly many birds of good wing (as kites, and the like,) would bear up a good weight as they fly; and spreading of feathers thin, and close and in great breadth, will likewise bear up a great weight ; being even laid, without tilting upon the sides.  Aerial Navigation - Página 11por Charles Blachford Mansfield - 1877 - 513 páginasVista completa - Acerca de este libro
 | Evelyn Charles Vivian - 1921 - 648 páginas
...mention of any specific subject, he does not appear to have made attempt at serious investigation. ' Spreading of Feathers, thin and close and in great breadth will likewise bear up a great Weight,' says Francis, ' being even laid without Tilting upon the sides.' But a lesser genius could have told... | |
 | Evelyn Charles Vivian - 1921 - 658 páginas
...specific subject, he does not appear to have made attempt at serious investigation, ' Spreading of 20 Feathers, thin and close and in great breadth will likewise bear up a great Weight,' says Francis, ' being even laid without Tilting upon the sides.' But a lesser genius could have told... | |
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