Use and disuse of parts, effects of, ii. [295]-[303], [352]-[353], [418]-[419];
in rabbits, i. 124-128;
in ducks, i. 284-286.
Utility, considerations of, leading to uniformity, ii. [241].
Valentin, experimental production of double monsters by, ii. [340].
Vallota, ii. [139].
Van Beck, Barbara, a hairy-faced woman, ii. [4].
Van Mons on wild fruit-trees, i. 312, ii. [260];
production of varieties of the vine, i. 333;
correlated variability in fruit-trees, ii. [330];