Very few readers condescend to peruse a preface, especially if it be long. The present therefore shall be very short. I need allude only to two things, the object of our inquiries, and the reason why I call them ours. Our inquiries may be divided into three kinds; anatomical, physiological, and physiognomical. At first, Dr. Galls chief intention was to point out the functions of the brain. Now, an exact knowledge of the functions of any organic part requires an examination of its structure; for physiology without anatomy is unfounded, while anatomy without physiology is useless. We therefore never separate anatomy and physiology from each other. Moreover, anatomical and physiological inquiries as to the brain have led us to those of the five external senses, and of the nervous system in general. - The third kind of investigation is the result of the other two.