By reference to Figs. 72 and 80, the reader will be able to locate the region of the volitive faculties, previously described under the generic term _will_. This temperament is characterized by ambition, energy, industry, perseverance, decision, vigilance, self-control, arrogance, love of power, firmness, and hardihood. These faculties express concentration of purpose and their functional equivalents are power of elaboration, constructiveness, condensation, firmness of fiber, compactness of frame, and endurance of organization. The pulse is full, firm, and regular, the muscles are strong and well marked, the hair and skin dark, the temporal region is not broadly developed, the face is angular, its lines denoting both power of purpose and strength of constitution, with resolution and hardihood blended in the expression. The volitive temperament is distinguished by height of the posterior, superior occipital region, called the crown of the back head, and by corresponding breadth from side to side. The rule given by Dr. J.R. Buchanan applies not only to the convolutions, but to the general development of the brain; _length gives power, or range of action_, and _breadth gives copiousness, or activity of manifestation_. Thus a high, _narrow_ back head indicates firmness and decision, but it is not as constant and copious in its manifestation as when it is associated with breadth. An individual having a narrow, high head, may determine readily enough upon a course of action, but he requires a longer period for its completion than one whose head is both high and broad. Such a cerebral conformation cannot accomplish its objects without enjoying regular rest, and maintaining the best of habits. Breadth of this region of the brain indicates ample resources of energy, both psychical and physical. It denotes greater vigor of constitution, one that continually generates volitive forces, and its persistency of purpose may be interpreted as functional tenacity. Inflexibility of will and purpose impart their tenacious qualities to every bodily function. The _will_ to recover is often far more potent than medicine. We have often witnessed its power in restraining the ravages of disease. The energetic faculties, located at the upper and posterior part of the head, are the invigorating, or _tonic_ elements of the constitution, imparting hardy, firm, steady, and efficient influences, checking excess of secretion, repressing dissipation, and tending to maintain self-possession, as well as healthy conditions of life. Fig. 90 is a portrait of U.S. Grant, which shows a well-balanced organization, with sufficient volitive elements to characterize the constitution. [Illustration: Fig. 90.]