together and run into each other like different shades of the same
color, the species of things are absolutely distinct, and that there
are certain fixed boundaries which separate them, however difficult it
may be for us to find them out. In regard to intelligence and instinct,
the two principles seem to us to be not more distinctly and widely
separated in their nature than in the provinces of their operation.

Sir Henry Holland, who believes that intelligence and instinct are
blended in man, admits that instincts, properly so called, form the
_minimum_ in relation to reason, and are difficult of definition from
their connection with his higher mental functions, but that, wherever
we can truly distinguish them, they are the same in principle and
manner of operation as those of other animals. He makes one
distinction, however, between the instincts of man and those of lower
animals,--that in the former they have more of individual character,
are far less numerous and definite in relation to the physical
conditions of life, and more various and extensive in regard to his
moral nature. But, on the other hand, Sir B.C. Brodie seems to be of
opinion that the majority of instincts belonging to man resemble those
of the inferior animals, inasmuch as they relate to the preservation of
the individual and the continuation of the species; and that when man
first began to exist, and for some generations afterwards, the range of
his instincts was much more extensive than it is at the present time.
When authorities so eminent as these differ so widely upon the
question, to what human instincts relate, we see at least that it is
very difficult to define and distinguish these instincts, and we may be
led to doubt their existence at all. Of that marvellous endowment which
guides the bee to fabricate its cells according to laws of the most
rigid mathematical exactness, and guides the swallow in its long flight
to its winter home, we agree with Professor Bowen, that there is no