s, and animals; the
sciences which embody the knowledge man has acquired upon these subjects
are commonly termed Natural Sciences, in contradistinction to other so-
called "physical" sciences; and those who devote themselves especially to
the pursuit of such sciences have been and are commonly termed
"Naturalists."

Linnaeus was a naturalist in this wide sense, and his "Systema Naturae" was
a work upon natural history, in the broadest acceptation of the term; in
it, that great methodising spirit embodied all that was known in his time
of the distinctive characters of minerals, animals, and plants. But the
enormous stimulus which Linnaeus gave to the investigation of nature soon
rendered it impossible that any one man should write another "Systema
Naturae," and extremely difficult for any one to become even a naturalist
such as Linnaeus was.

Great as have been the advances made by all the three branches of
science, of old included under the title of natural history, there can be
no doubt that zoology and botany have grown in an enormously greater
ratio than mineralogy; and hence, as I suppose, the name of "natural
history" has gradually become more and more definitely attached to these
prominent divisions of the subject, and by "naturalist" people have meant
more and more distinctly to imply a student of the structure and function
of living beings.

However this may be, it is certain that the advance of knowledge has
gradually widened the distance between mineralogy and its old associates,
while it has drawn zoology and botany closer together; so that of late
years it has been found convenient (and indeed necessary) to associate
the sciences which deal with vitality and all its phenomena under the
common head of "biology"; and the biologists have come to repudiate any
blood-relationship with their foster-brothers, the mineralogists.

Certain broad laws have a general application throughout both the animal
and the vegetable worlds, but the ground common to these kingdoms of
nature is not of very wide extent, and the multiplicity of details is so
great, that the student of living beings finds himself obliged to devote
his attention exclusively either to the one or the other. If he elects to
study plants, under any aspect, we know at once what to call him. He is a
botanist, and his science is botany. But if the investigation of animal
life be his choice, the name generally applied to him will vary according
to the kind