"Does Structure originate Function, or does Function originate Structure? is a question about which there has been disagreement. Using the word Function in its widest signification, as the totality of all vital actions, the question amounts to this--Does Life produce Organization, or does Organization produce Life? "To answer this question is not easy, since we habitually find the two so associated that neither seems possible without the other; and they appear uniformly to increase and decrease together.... There is, however, one fact implying that Function must be regarded as taking precedence of Structure. Of the lowest Rhizopods, which present no distinctions of parts, and nevertheless feed and grow and move about, Prof. Huxley has remarked that they exhibit Life without Organization.... "It may be argued that on the hypothesis of Evolution, Life necessarily comes before organization. On this hypothesis, organic matter in a state of homogeneous aggregation, must precede organic matter in a state of heterogeneous aggregation. But since the passing from a structureless state to a structured state, is itself a vital process, it follows that vital activity must have existed while there was yet no structure: structure could not else arise. That function takes precedence of structure, seems also implied in the definition of Life. If Life consists of inner actions so adjusted as to balance outer actions--if the actions are the _substance_ of Life, while the adjustment of them constitutes its _form_; then, may we not say that the actions to be formed must come before that which forms them--that the continuous change which is the basis of function, must come before the structure which brings function into shape? Or again, since throughout all phases of Life up to the highest, every advance is the effecting of some better adjustment of inner to outer actions; and since the accompanying new complexity of structure is simply a means of making possible this better adjustment; it follows that function is from beginning to end the determining cause of structure."--_Principles of Biology_, by Mr. Herbert Spencer, p. 153, seq. We now return to Kant, from whom Dr. Whewell quoted the sentence--"An organized product of nature is that in which all the parts are mutually ends and means." Passing by a metaphysical paragraph expressed in a manner too technical for the general reader, Kant's practical comment on this sentence runs as follows:--