True science is never speculative; it employs hypotheses as suggesting points for inquiry, but it never adopts the hypotheses as though they were demonstrated propositions.
The inquiries of the jurist are in truth prosecuted much as inquiry in physic and physiology was prosecuted before observation had taken the place of assumption.
Faced with this general consideration it will immediately be realized on inquiry into the particular position occupied within this general scheme by the scientific field of catalysis that it is in the first stages of its development.