It is very evident that this cannot be due to the mere alteration of primitive forms. The elements of the organism undergo modification, and are differently associated and combined according to the race. But these elements themselves often undergo most fundamental disturbance. Certain acids are diminished or disappear, and are replaced by sugar, a sweet taste and perfume, which develop and characterise certain races of vegetables and fruits, and show that the vital forces of these plants have been subjected to very substantial modifications faithfully transmitted from generation to generation. The objection will perhaps be made that there is too little resemblance between vegetable and animal organisms for the above comparison of anatomical facts to be really useful. It is different in physiological phenomena. Vital activity in our cultivated plants sometimes presents very remarkable differences in different races. In our several races of corn, the rapidity of development varies from simple to triple. In temperate climates barley requires five months to germinate, grow and ripen. In Finland and Lapland it only takes two months to accomplish the same phases of growth. And, finally, it is well known that in our kitchen and fruit gardens we find races and varieties, some of which are fast and some slow growers. The energy of the reproductive organs often varies in a singular manner in different races. We have, for instance, roses which bloom two or three times a year, and strawberries which remain in fruit nearly the whole year. There are oranges crammed with pips, and others in which they are almost entirely wanting. Lastly, in some bananas and in the currant-grape the seeds have completely disappeared. We see at once that these latter products of human industry only exist as _varieties_. IV. In animals we meet with facts which correspond exactly with those which we have just observed in plants. Further, we find that they experience modifications connected with the manifestations of the _something_ which we have called the _Animal Mind_.