 | American Academy of Arts and Sciences - 1907 - 1010 páginas
...occurs with lights varying in intensity from 2 candle-power at 2 meters distance (0.5 candle-meter), t) 250 candle-power at 2 meters distance (62.5 candle-meters)....present investigation. His conclusions were based in large part upon observations in the field, supplemented by a number of experiments conducted in the... | |
 | American Academy of Arts and Sciences - 1907 - 874 páginas
...between light derived from a large luminous area and that from a small one, even when the light from the two sources is of equal intensity as it falls on the animal, and that it usually flies toward the larger areas of light. He took the biological significance of... | |
 | 1920 - 570 páginas
...discriminate between light derived from a large luminous area and that from a small one, even when light from these two sources is of equal intensity...butterflies usually fly toward the larger areas of light. He (1903, p. 465) remarks that in the sunlit spots in the woods, this butterfly responds to the large... | |
 | Justus Watson Folsom - 1906 - 514 páginas
...less intensity provided they are all of at least moderate intensity and of approximately equal size. V . antiopa does discriminate between light derived...butterflies usually fly toward the larger areas of light. This species remains in flight near the ground because it reacts positively to large patches of bright... | |
 | 1920 - 596 páginas
...discriminate between light derived from a large luminous area and that from a small one, even when light from these two sources is of equal intensity...butterflies usually fly toward the larger areas of light. He (1903, p. 465) remarks that in the sunlit spots in the woods, this butterfly responds to the large... | |
 | Justus Watson Folsom - 1922 - 522 páginas
...less intensity provided they are all of at least moderate intensity and of approximately equal size. V. antiopa does discriminate between light derived...butterflies usually fly toward the larger areas of light. This species remains in flight near the ground because it reacts positively to large patches of bright... | |
 | 1907 - 876 páginas
...between light derived from a large luminous area and that from a small one, even when the light from the two sources is of equal intensity as it falls on the animal, and that it usually flies toward the larger areas of light. He took the biological significance of... | |
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V . antiopa does discriminate between light derived from a large luminous area and that from a small one, even when the light from these two sources is of equal intensity as it falls on the animal. These butterflies usually fly toward the larger areas... 