perpetuating, and engraving still more deeply unto the mind of man
acquisitions already approved by common experience, but somewhat
careless about extension of empire, or at any rate disinclined, for
the most part, to active effort on their own part for the sake of
such extension--neither progressive, in fact, nor aggressive--but
quiet, peaceable people, who wish to live and let live, as their
fathers before them; while the other class is chiefly intent upon
pushing forward the boundaries of science, and is comparatively
indifferent to what is known already save in so far as necessary for
purposes of extension. These last are called pioneers of science,
and to them alone is the title "scientific" commonly accorded; but
pioneers, unimportant to an army as they are, are still not the army
itself; which can get on better without the pioneers than the
pioneers without the army. Surely the class which knows thoroughly
well what it knows, and which adjudicates upon the value of the
discoveries made by the pioneers--surely this class has as good a
right or better to be called scientific than the pioneers themselves.

These two classes above described blend into one another with every
shade of gradation. Some are admirably proficient in the well-known
sciences--that is to say, they have good health, good looks, good
temper, common sense, and energy, and they hold all these good things
in such perfection as to lie altogether without introspection--to be
not under the law, but so utterly and entirely under grace that every
one who sees them likes them. But such may, and perhaps more
commonly will, have very little inclination to extend the boundaries
of human knowledge; their aim is in another direction altogether. Of
the pioneers, on the other hand, some are agreeable people, well
versed in the older sciences, though still more eminent as pioneers,
while others, whose services in this last capacity have been of