if now, in the light of the above classification, we attempt to lay out a complete psychological pri)gramnie. we shall arrive at some such result as the following. The psychologist will prepare himself for his work by a study of the nervous system at its various developmental levels. Enter ing psychology proper, he will seek to de termine, on the structural side of mind, the number and nature of the mental elements. the patterns upon which they are arranged in the complex processes, and the gradual growth in intricacy of these patterns as mental develop ment proceeds; on the functional side. the nature of the root-functions of hnentation, the mode of coiiperation of these functions in the developed mind, and their gradual growth in complexity from the infant to the man. Tn his study of function, he will he keen to note differenees, in dividual variations, as well as uniformities. He will, further, give some attention to the questions of classification and arrangement of the typical mental formations, keeping the genetic principle well in view. He will endeavor to extend his knowledge of mental function beyond civilized humanity to the animals and the lower races of man, and to trace the psyc•Ralogiig] laws underlying the great products of the collective mind—language, custom, and nn•th. here, too, his work will be informed by the genetie spirit. During his occupation with normal phenomena, he will not neglect the observation of the abnor mal. he nlay attack the questions that lie on the border line between science and phi losophy, the questions of the appearance of mind in the evolution of the universe, I if the criterion of mentality in the lowest animals, of the ulti mate nature of mind, of the relation of mind to body; or he may turn the results of his scientifie inquiries to immediate practical account, em bodying them in some psychologically grounded system of cdtteat ion. The programme is too large for any one man to cover; and the interests which it denlaljds—pbilosopbicnf, scientific, prae tieal—would hardly appeal, in any eaves to a single personality. 111t we can see, assisted by biological analogy, that it is unitary and self-consistent.
BIBLIOGRAPHY. Special references will he found Bibliography. Special references will he found under the headings ANIMAL PSYCHOLOGY; CHILD PSYCH()Limy ; l'SYCHoLoGY, ETHNIC; PsYcl101.
OGY, EXPERIMENTAL; GENETIC PSYCHOLOGY; IN DIVIDUAL PSYCHOLOGY; :MENTAL PATtioLouv ; l'srcitomtvsics; SOCIAL PSYCHOLOGY. General introductions to psychology are: Baldwin, Story of the Mind (New Yo•k, 1898) ; Buell, Essentials of Psychology (Boston, 1898) ; Ladd, Primer (New York, 1894) ; and Titchener, Primer (New York, 1900). Useful works of text-book size are Baldwin, Elements (New Yo•k, 1893) ; Dewey, Psychology (New Yo•k, 1898) ; 1-174ding, Out lines (Loudon, 1891) ; James, Text-book (New York, 1892) ; Ladd. (Whines of Descriptive Psy chology (New York, 1898) : Maher, Psychology (London, 1900) ; Mercier, Sanity and Insanity (London, 1390) ; Moll, Hypnotism (London, 1891) ; Morgan, Introduction to Comparative Psychology (London, 1894) ; Murray, Handbook (Boston, 1890) ; Ribot, Psychology of thc Emo tions (London, 1897). and other works; Scrip ture, The Yew Psychology ( London, 1897) ; Kiilpe, Outlines (London, 1895) : Ladd. Elements (London, 1889) ; Titcheucr• Outline (New York, 1899) : Yl'undt, Human «nd ,Inimol Psychology (trans., London, 1896) ; id., Outlines (trans., 1898) ; Ziehen, Introduction to Physi ological Psych-ology (London• 1895). Larger treatises are Bain, Senses and Intellect (London, 1868) : id., Emotions and Will (London, 1880) ; Baldwin, Handbook (New York, 1890-91) ; id., Mental Development (New York, 1895-97) ; Cor nelius, Psychologic (Leipzig, 1897) ; 146fler, Pay rbo/ogie (Vienna. 1897) : James. Prineiv/es (New York, 1890) ; Jodl, Lebrblieb (Stuttgart, 1896); Ladd, Elements of Physiological Psychology (New York. 1889) ; id., Psychology, Descriptive and Ex planatory (N('W York, 1894) ; T,ipps, Orundthat sachen des Seelenlebens (Bonn. 1S83) : Marshall, Instinct and Reason (New Yo•k, 1898) ; Morgan, Animal Life and intelligence (London, 1891 ) ; id., Habit and Instinct (London, 1896) ; Romanes, Mental Ero/ntion (London, 1888) ; Stout• Analy tic Psychology (London. 1896) ; Sully, Human M Ind (London, 1892) ; Volkmann, Leh rburh IKOthen, 1884) Wundt, Physiologischc Psycho.
logic (Leipzig. 1893). it must be understood that this list is merely selective, even for the quite recent period which it covers,