Hence our real intention is to indicate that the word design, as here used, only signifies a principle of reﬂective, and not of determining, judgement, and consequently is not meant to introduce any special ground of causality, but only to assist the employment of reason by supplementing investigation on mechanical laws by the addition of another method of investigation, so as to make up for the inadequacy of the former even as a method of empirical research that has for its object all particular laws of nature.