We do not wish to underrate any attempt heretofore made to classify the functions of mind and assign to them an appropriate nomenclature. It is not unusual for scientists to give advice to phrenologists and point out the fallacies of their system; but it is hardly worth while to indulge in destructive criticism, unless something better is offered, as the day has passed for ridiculing endeavors to understand and interpret the physiology of the brain. The all important question is, not whether phrenologists have properly located and rightly earned all the faculties of mind, but have their expositions been useful in the development of truth. While endeavoring to connect each mental power with a local habitation in the brain, the system of phrenology may be chargeable with some incongruous classification of the faculties, and yet it has furnished an analysis of the mind which has been of incalculable service to writers upon mental philosophy. Phrenology, in popularizing its views, has interested thousands in their own organizations and powers, who would otherwise have remained indifferent. It has called attention to mental and bodily unities, has served as a guide to explain the physical and psychical characteristics of individuals, and has been instrumental in applying physiological and hygienic principles to the habits of life, thus rendering a service for which the world is greatly indebted. Samuel George Morton, M.D., whose eminent abilities and scholarship are unquestionable, employs the following language: "The importance of the brain as the seat of the faculties of the mind, is pre-eminent in the animal economy. Hence, the avidity with which its structure and functions have been studied in our time; for, although much remains to be explained, much has certainly been accomplished. We have reason to believe, not only that the brain is the center of the whole series of mental manifestations, but that its several parts are so many organs, each one of which performs its peculiar and distinctive office. But the number, locality, and functions of these several organs are far from being determined; nor should this uncertainty surprise us, when we reflect on the slow and devious process by which mankind has arrived at some of the simplest physiological truths, and the difficulties that environ all inquiries into the nature of the organic functions." [Illustration: Fig. 77. Side view of the brain of a Cat. A. Crucial sulcus dividing anterior convolutions. B. Fissure of Sylvius. C. Olfactory bulb.]