This difficulty, though appearing insuperable, is lessened, or, as I believe, disappears, when it is remembered that selection may be applied to the family, as well as to the individual, and may thus gain the desired end.

Breeders of cattle wish the flesh and fat to be well marbled together.

An animal thus characterized has been slaughtered, but the breeder has gone with confidence to the same stock and has succeeded.

Such faith may be placed in the power of selection that a breed of cattle, always yielding oxen with extraordinarily long horns, could, it is probable, be formed by carefully watching which individual bulls and cows, when matched, produced oxen with the longest horns; and yet no one ox would ever have propagated its kind.

Here is a better and real illustration: According to M.