Cassell's Book of Birds, Part 2
Boring Books for Bedtime Readings to Help You Sleep
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The Wing of a Bird
The wing of a bird will be found to present a structure worthy of our highest admiration. The object aimed at in the arrangement of its different parts is evidently to obtain a very large and firm expansive surface by employing the smallest possible quantity of material. We have already seen, while examining the construction of the skeleton, that the bony framework of the wing essentially resembles that of the human arm. It is no more adapted for flying than our own.
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