"Beyond all doubt it is a most extraordinary work, exhibiting the working of a mind of no common stamp. Close students and hard thinkers will find in it a rich treat, a deep and rich mine of thought."--_Gospel Herald, Cincinnati_. "They have had sufficient evidence to satisfy them that Dr. Buchanan's views have a rational, experimental foundation, and that the subject opens a field of investigation second to no other in immediate interest, and in the promise of important future results to science and humanity."--_Report of New York Committee (WM. CULLEN BRYANT, Chairman)_. "If he has made a single discovery in physiology, he has made more than any previous explorer of that science, in furnishing us this key to the whole of its principles, by his cerebral and corporeal experiments."--_Report of the Faculty of Indiana University_. "No person of common discernment who has read Dr. Buchanan's writings or conversed with him in relation to the topics which they treat, can have failed to recognize in him one of the very foremost thinkers of the day. He is certainly one of the most charming and instructive men to whom anybody with a thirst for high speculation ever listened."--_Louisville Journal (edited by PRENTICE and SHIPMAN)_. "To Dr. Buchanan is due the distinguished honor of being the first individual to excite the organs of the brain by agencies applied externally directly over them, before which the discoveries of Gall, Spurzheim, or Sir Charles Bell--men who have been justly regarded as benefactors of their race--dwindle into comparative insignificance. This important discovery has given us a key to man's nature, moral, intellectual, and physical."--_Democratic Review, New York_. "THERAPEUTIC SARCOGNOMY." "In this work we have the rich results of half a century of original thought, investigation, and discovery. Upon the psychic functions of the brain, Professor Buchanan is the highest living authority, being the only investigator of nature who has done anything important for that neglected realm of science, to which the world was introduced by the genius of Gall and Spurzheim. This work is really a complete exposition of the great mystery, the united operation and structural plan of soul, brain, and body."--_Medical Advocate, New York_.