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This fluid being
somewhat changed in its qualities by its new-comer,           the
minute vessels of the parts which surround it, and thus causes more of
this fluid to be formed; and while it affords the animalcule material
for its development, it puts the delicate membrane of the ovary which
retains it in its place upon the stretch, and finally bursts forth
surrounded probably by an exceedingly delicate membrane of its own.