periosteum of a dog producing bone in, ii. [369].
Race-horse, origin of, i. 54.
Races, modification and formation of, by crossing, ii. [95]-[99];
natural and artificial, ii. [245];
Pouchet's views on plurality of, i. 2;
of pigeons, i. 207-212.
Radishes, i. 326; crossing of, ii. [90];
varieties of, ii. [217]-[218].
Radclyffe, W. F., effect of climate and soil on strawberries, i. 354;
constitutional differences in roses, i. 367.