ABSTRACT
The life of the lowest sentient being is made possible only by an organic classification of impressions. The condition on which every creature exists, is, that it shall act in special ways under special stimuli —that contact with nutritive matter shall modify its actions in a manner different from that in which contact with innutritive matter modifies them—that one impression shall lead it to attack, another to hide, and so on. When it is remembered that the laws of structure and function must necessarily harmonize; and that the structure and functions of the nervous system must conform to the laws of structure and function in general; it will be seen that the parallelism here roughly indicated, is such as might be expected to hold. It will be seen that the ultimate generalizations of Psychology and Physiology, must be, as they here appear, different sides of the same primordial truth.
