 | Thomas Walker (Portrait painter) - 1810 - 88 páginas
...with its elastic power, and thereby causes a projectile force, which impels the bird forwards ; thus we see that by one act of the wings the bird produces...bird, and to prevent the vacillation of the whole. Thus having discovered and explained to my readers, the natural mechanical means by which birds accomplish... | |
 | 1835 - 430 páginas
...with its elastick power, and thereby causes a projectile force, which impels the bird forwards ; thus we see that by one act of the wings the bird produces...the most important use of the tail is to support the postérieur weight of the bird, and to prevent the vacillation of the whole. The following observations... | |
 | 1835 - 430 páginas
...with its elastick power, and thereby causes a projectile force, which impels the bird forwards ; thus we see that by one act of the wings the bird produces...the most important use of the tail is to support the postérieur weight of the bird, and to prevent the vacillation of the whole. The following observations... | |
 | Aeronautical Society of Great Britain - 1877 - 556 páginas
...with its elastic power, and thereby causes a projectile force, which impels the bird forwards ; thus we see that by one act of the wings the bird produces...bird, and to prevent the vacillation of the whole. Thus having discovered and explained to my readers the natural mechanical means by which birds accomplish... | |
 | James Means - 1894 - 224 páginas
...with its elastic power, and thereby causes a projectile force, which impels the bird forwards ; thus we see that by one act of the wings the bird produces...bird, and to prevent the vacillation of the whole. Thus having discovered and explained to my readers the natural machanical means by which birds accomplish... | |
 | 1894 - 642 páginas
...with its elastic power, and thereby causes a projectile force, which impels the bird forwards ; thus we see that by one act of the wings the bird produces...consequently descends ; but the most important use of ttie tail is to support the posterior weight of the bird, and to prevent the vacillation of the whole.... | |
 | Francis Herbert Wenham - 1910 - 168 páginas
...with its elastic power, and thereby causes a projectile force, which impels the bird forwards ; thus we see that by one act of the wings the bird produces...bird, and to prevent the vacillation of the whole. Thus having discovered and explained to my readers the natural mechanical means by which birds accomplish... | |
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... they give way to the resisting power of the compressed air, which rushes upwards past the same back edges, acting against them with its elastic power, and thereby causes a projectile force, which impels the bird forwards ; thus we see that by one... 