. Fig. lo. Lower and upper surface respectively of Ageronia fervnia (author's specimen); general color, a greenish gray commonly dreaded and avoided. Such utility is mainly defen- sive, though on occasion it might facilitate the approach of an animal upon its prey. At close range the high colors— red, green, blue, etc. — stand out distinctly, but in the distance all colors tend to blend into a theoretical white, in fact, a dirty gray, as may be noted when viewing a distant scene where the earth and sky line meet almost imperceptibly.^ Artists know this fact and use the grays for distant effect
. Fig. lo. Lower and upper surface respectively of Ageronia fervnia (author's specimen); general color, a greenish gray commonly dreaded and avoided. Such utility is mainly defen- sive, though on occasion it might facilitate the approach of an animal upon its prey. At close range the high colors— red, green, blue, etc. — stand out distinctly, but in the distance all colors tend to blend into a theoretical white, in fact, a dirty gray, as may be noted when viewing a distant scene where the earth and sky line meet almost imperceptibly.^ Artists know this fact and use the grays for distant effects except when under strong sunlight. This explains why so many animals that live more or less in the open are of a dirty brown or gray color. Of all shades it is 1 On the principle that all colors taken together make white. In nature all colors do not exist in proper proportions and the general result is a j ray.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplants, bookyear1910
