Parkinson, Mr., varieties of the hyacinth, i. 370.
Parkyns, Mansfield, on Columba guinea, i. 183.
Parmentier, differences in the nidification of pigeons, i. 178;
on white pigeons, ii. [230].
Parrots, general sterility of, in confinement, ii. [155];
alteration of plumage of, ii. [280].
Parsnip, reversion in, ii. [31];
influence of selection on, ii. [201];
experiments on, ii. [277];
wild, enlargement of roots of, by cultivation, i. 326.