Evenings at the microscope : or, Researches among the minuter organs and forms of animal life (1884)
Gosse, Philip Henry, 1810-1888 · London : Society for Promoting Christian Knowledge · leaf 28
. It is essential that with great lightness and buoyancy—for the bird is a flyingcreature—there be power to strike the air with a broadresisting surface. The wide vanes of the quill-feathersafford these two requisites, strength and lightness; thelatter depending on the material employed, which is… … 16 EVENINGS AT THE MICROSCOPE. scope, we see that the central stem carries on each side arow of barbs, which interlock with each other. The mag-nifying power shows us that these barbs are not simplefilaments, but are themselves doubly bearded in the samefashion; and further, that these little…
Zoology · Microscopy
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