The latter never exceed four joints, which seems the most natural number; and the former are limited to three.
The natural number of wings in the insect world is four, arranged in two pairs.
The most natural number is four, for this obtains in the majority.
Half the product of the two might, perhaps, seem to be a natural number to adopt for symbolic purposes.
This is the most universal, and may be called the natural number of these joints.
Let us run through them:—In the Coleoptera the natural number of joints is eleven; but this rule is not without many exceptions.
When the savage has finished his count of the fingers of a single hand, he has reached this natural number base.
|natural number |
A positive integer.