45

Logic II 43b

vidual specimens before him, from which he may
get an idea of the amount and kind of individual
or geographical variation to which the given species
is subject. In proportion as the category of the class is
highter, the greater will be the necessity need of a
multiplicity of examples. True, a naturalist may
be so familiar with what a Genus is, what a Family
is, what an Order is, what a Class is, that if you
move to show him a new specimen of a hitherto unknown
Class, he could, with that single specimen
before him, sit down and write out definitions, not
only of its Class, but also of its Order, of its Family,
and of its Genus, as well as of its Species. Such a
feat would display marvellous familiarity with what those
Categories in Botany and in Zoology; but intellectually
it is a would be a performance of no high order, and the
less so the greater the certainty of the conclusion. Gene-