CHAP. 119.—HOW THE GREATEST EFFICACY IN PLANTS MAY BE
ENSURED.
It is also an undoubted truth, that the virtues and properties
of all roots are more feebly developed, when the fruit has been
allowed to ripen; and that it is the same with the seed, when
incisions have been previously made in the root, for the extraction of the juice. The efficacy, too, of all plants is impaired
by making habitual use of them; and these substances, if employed daily, lose equally their good or bad properties, when
required to be effectual. All plants, too, have more powerful
properties, when grown in soils that are cold and exposed to
the north-eastern blasts, or in dry localities.
