115

1908 Dec 1
Logic
I.i. 18

affiliations of scientific are some more, some less; and
this more and less is not that of a smooth slope, but
is broken into unequal steps with landings, fligts, and so on, in consequence
of which I think of science as having its species, genera, families
and so on. It is not necessary that I should give the whole
scheme. Suffice it to say that I recognize three great branches
of science; first, theoretical science, secondly science of review, such as
Auguste Comte and Herbert Spencer and Alexander von Humboldt
studied together with the whole activity of those who classify the sciences
and those who compile handbooks and other digests; and thirdly,
the practical sciences, whose cultivators are aided by
the digests of the second branch, while those who further that
depend upon the published works of theoretical science. In this