ABSTRACT
Considered under its most general form, every correspondence effected between the organism and the environment, involves two things—the reception of one or more impressions, and the performance of one or more appropriate motions. A power to perceive the position of an object in space, must be accompanied by a power to specialize the movements; otherwise it can be of no service. The recognition of certain forms, colours, and motions as those of an enemy, will not prevent destruction unless it be followed by such velocity of motion, such doublings, such leaps, as the enemy may be eluded by. Higher powers of motion and locomotion, must unavoidably bring the organism into relation with a greater number of objects; and must so result in multiplying its impressions. Higher sensitiveness in the organism, must unavoidably entail more frequent stimuli to action; and must so multiply its motions and locomotions.
