564 PHILOSOPHICAL PERIODICALS. Stimulus. C'ompl. zone. Colourless zone. Like-col. zone. Same-col, vine. Red Bluish White Orange Red Orange Bluish White Orange Yellow Bluish White Orange Green Yellow-reddish White Bright yellow Green Blue Yellowish White Blue Violet Yellowish White Blue Violet Purple Yellow-greenish White Purple It is hardly likely that these results (and especially that which makes yellow invisible in indirect vision) will be verified by future obsent'iv.J W. Wimtlt. ' Zur Technik des Complicationspendels.' [Description of the instrument, and directions for its use : see MIND, 1899, p. 564.] VlEETEI.JAHRSSCHRIFT FUK WlSSENSCHAFTLICHK PHILOSOPHIB. Jahrg. xxiv., Heft. 3. Eugen Paach. ' Ausgangspunkte zu einer Theori< der Zeitvorstellung (Schluss).' [Historical and critical survey of the principal theories of time.] C. M. Giesler. ' Die Identificirung von Personlich- keiten.' [Identification of persons depends on three kinds of reproduction. (1) The reinstatement of the content of previous sense-presentations ; (2) revival of emotional states ; (3) recall of the groups of ideas connected with the special situation in which a person has been previously met with. The last kind of reproduction is primarily the revival of an " intellectual mood" (Stimmung). It is maintained that the three kinds of reproduction operate in the order in which they are here named.] T. H. Lindner. ' Beharrung und Verandemng als Geschichtliche Krafte. [The persistence of established modes of social life is in the main only disturbed by external or quasi external influences. Among these must be reckoned the influence of individuals great men. After disturbance the old order tends to reassert itself in a modified form.] ARCHIV FUR SYSTBMATISCHK PHILOSOPHIB. Neue Folge. Bd. i.. Heft 3. E. von Hartmann. 'Zum Begriff des Unbewussten.' [Distinguishes the various meanings of the word "unconscious". A, The unconscious in an epistemological sense, including (1) what is simply unknown; 2) possibilities of perception not realised at the time ; (3) the unknowable. B, The physical unconscious, including (1) privation of that consciousness which an individual is capable of possessing the unconsciousness of dreamless sleep or a swoon ; (2) the incapacity for any kind of conscious- ness such as is ordinarily attributed to inorganic matter ; (3) physiological conditions of a stationary kind ; (4) those physiological processes which have no correlate in consciousness. C, The psychical unconscious including (1) the absence of a special kind or form of consciousness. <.(/., the indistinct or unnoticed, or that of which we are conscious without being aware that we aVe conscious of it ; (2) the relatively unconscious, including all "split off consciousness" all experiences correlated with physiological process in an individual organism, but not entering into the " central consciousness " ; (3) the absolutely unconscious. This last includes the activities which generate consciousness and its contents, and the subject which is the agent of these activities. V. Hartmann notes that in his Phil, deg Unbewusste.n he has not distinguished with sufficient clearness the relatively from the absolutely unconscious.] E. Mally. 'Abstraktion und Aehnlichkeits-Erkenntniss.' [Criticism of Cornelius' theory according to which Abstraction depends on the forma- tion of different qualitative series due to perception of resemblances in various respects, so that, for example, to consider the loudness of a sound in abstraction from other character is to refer the sound to the series based on comparison in respect of loudness. Mally objects, (1) that if