A black character is not changed in a day to white saintliness, any
more than a black berry to a white one.
In turning out the white blackberry Mr. Burbank is said to have
applied the Darwinian theory inversely. He kept on selecting
berries which, in ripening, did not become pure black, and
finally got a bush in which the fruit changed from the green
of immaturity to pure white. This involved the examination of
some 25,000 bushes several times in several succeeding years.
The painstaking energy necessary in such a search is merely
suggested by such figures.--_The Strand Magazine._
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