BOOK II PART I
to be expected; and if we find upon trial, that
the explication of these phaenomena, which we
make use of in one species, will not apply to
the rest, we may presume that that explication,
however specious, is in reality without founda-
tion.
In order to decide this question, let us con-
sider, that there is evidently the same relation
of ideas, and derived from the same causes, in
the minds of animals as in those of men. A dog,
that has hid a bone, often forgets the place; but
when brought to it, his thought passes easily to
what he formerly concealed, by means of the
contiguity, which produces a relation among
his ideas. In like manner, when he has been
heartily beat in any place, he will tremble on
his approach to it, even though he discover no
signs of any present danger. The effects of re-