[PSYCHOLOGY]. HEINROTH, Johann Christian August. Lehrbuch der Strungen des Seelenlebens oder der Seelenstrungen und ihrer Behandlung. Leipzig, 1818. 2 vols. Folding table. Contemporary mottled boards (some browning). Fine copy. "His terminology, which was purely theological, masks the fact that he was an excellent clinician whose conclusions about mental illness show an understanding of medical psychology" (Norman). Garrison-Morton 4926; Norman 1038. -- Louis Florentin CALMEIL. De la paralysie considere chez les alins, recherches faites dans le service de feu M. Royer-Collard et de M. Esquirol. Paris and London, 1826. Printed pink wrappers (chipped at heel of spine). "...a pupil of Esquirol, his treatise contains the classic description of general paralysis of the insane..." (Norman). Garrison-Morton 4797; Norman 390. -- Ernst FEUCHTERSLEBEN. Lehrbuch der rztlichen Seelenkunde. Vienna, 1845. Printed green wrappers, unopened (cracks in spine with wear at ends). "Feuchtersleben came closer than any one of the 'pure psychologists' of the first half of the [nineteenth] century to the solution of the problem of how mental disease develops and affects the personality...The present treatise introduced the terms 'psychosis,' 'psychiatrics,' and 'psychopathology...' (Norman). Garrison-Morton 4929.1; Norman 793. -- Karl Wilhelm IDELER. Der Wahnsinn in seiner psychologischen und socialen Bedeutung erlutert durch Krankengeschichten. Erster Band [all published]. Bremen, 1848. Printed green wrappers, unopened (chipped, text rather foxed). "Ideler was a leader of Germany's 'psychic' school, which held that mental illness was purely psychological in origin" (Norman 1140). -- Alexander BAIN. The Senses and the Intellect. London, 1855. Brown cloth (spine dampstained). "...Bain gave psychology a newly realistic physiological orientation by correlating mental processes with physiological ones" (Norman 111). -- Herbert SPENCER. The Principles of Psychology. London, 1855. Brown cloth (dull). "Spencer was the first to unite association psychology... with evolutionary biology" (Norman 1986). -- Eduard von HARTMANN. Philosophie des Unbewussten. Versuch einer Weltanschauung. Berlin, 1869. Contemporary mottled boards. "The concept of an unconscious as a source of novel ideas and actions, greatly favored by...Romantic philosophers, reached its apogee in Hartmann's Philosophy of the Unconscious" (Norman 1004). -- John Broadus WATSON. Psychology from the Standpoint of a Behaviorist. Philadelphia and London [1919]. Blue cloth (spine dull). "Watson founded the school of behaviorism, which holds that human behavior is determined not by mental processes but by conditioning" (Norman 2188). Together 8 volumes, 8o. Original bindings, except as indicated. FIRST EDITIONS. (8)