![Cover of Discovery that the veins of the bat's wing (which are furnished with valves) are endowed with rythmical [sic] contractility, and that the onward flow of blood is accelerated by each contraction](https://covers.openlibrary.org/b/id/11781751-M.jpg)
Discovery that the veins of the bat's wing (which are furnished with valves) are endowed with rythmical [sic] contractility, and that the onward flow of blood is accelerated by each contraction
Chiroptera
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For young readers
Book data: Open Library