Neither evolution nor involution will ever effect the value of a unit.
At all events, it is as impossible to demonstrate the non-existence of the one unit as the other.
Values are reckoned in “skins”—that is, a “skin” is the unit of value.
I saw myself now as part of the whole, a unit in the sum of a life which interested me.
And, for the size-change, a normal diameter, ...