More important is his deduction of equivalent weights, i.e.
This deduction is not in fact true.
During the last two centuries deduction has gone steadily out, and psychology come in.
An instantaneous deduction from the relation w= 2 n0 is that forms of uneven orders possess only invariants of even degree in the coefficients.
Thus a universal science of matter and motion was derived, by an unbroken sequence of deduction, from one radical principle; and analytical mechanics assumed the clear and complete form of logical perfection which it now wears.