approach to meet them. Fourthly, if you wrap wet moss round any joint of a
vine, or cover it with moist earth, roots will shoot out from it. Fifthly,
by the inoculation or engrafting of trees many fruits are produced from one
stem. Sixthly, a new tree is produced from a branch plucked from an old
one, and set in the ground. Whence it appears that the buds of deciduous
trees are so many annual plants, that the bark is a contexture of the roots
of each individual bud; and that the internal wood is of no other use but
to support them in the air, and that thus they resemble the animal world in
their individuality.

The irritability of plants, like that of animals, appears liable to be
increased or decreased by habit; for those trees or shrubs, which are
brought from a colder climate to a warmer, put out their leaves and
blossoms a fortnight sooner than the indigenous ones.

Professor Kalm, in his Travels in New York, observes that the apple-trees
brought from England blossom a fortnight sooner than the native ones. In
our country the shrubs, that are brought a degree or two from the north,
are observed to flourish better than those, which come from the south. The
Siberian barley and cabbage are said to grow larger in this climate than
the similar more southern vegetables. And our hoards of roots, as of
potatoes and onions, germinate with less heat in spring, after they have
been accustomed to the winter's cold, than in autumn after the summer's
heat.

II. The stamens and pistils of flowers shew evident marks of sensibility,
not only from many of the stamens and some pistils approaching towards each
other at the season of impregnation, but from many of them closing their
petals and calyxes during the cold parts of the day. For this cannot be
ascribed to irritation, because cold means a defect of the stimulus of
heat; but as the want of accustomed stimuli produces pain, as in coldness,
hunger, and thirst of animals, these motions of vegetables in closing up
their flowers must be ascribed to the disgreeable sensation, and not to the
irritation of cold. Others close up their leaves during darkness, which,
like the former, cannot be owing to irritation, as the irritating material
is withdrawn.

The approach of the anthers in many flowers to the stigmas, and of the
pistils of some flowers to the anthers, must be ascribed to the passion of
love, and hence belongs to sensation, not to irritation.

III. That the vegetable world