7 8 9 10 11 12 5 10 5 10 5 10 5 10 5 10 5 10 I. 22.5 29 27.5 25.5 26 22 22.5 27.5 25.5 25 22 28 II. 29 37.5 32.5 28 34 32 26 23 30.5 28 25.5 23 III. 20.5 8.5 12 16.5 21 9 32 3 21.5 15 8 22 IV. 31 26 39.5 41.5 37 29.5 28.5 37 36.5 30.5 33 31.5 V. 38 34 39 46.5 54 40 32.5 46 43.5 46 36.5 50.5 VI. 30 17 13 25 34.5 26.5 20.5 27 27 35 27.5 33 VII. 55.5 50 42.5 28 50.5 15.5 49 17.5 43.5 29.5 44 26.5 VIII. 16.5 21.5 18 17 17.5 21.5 21 22.5 21.5 23.5 23 27.5 IX. 41 46 45.5 43.5 46.5 33 39 37.5 32 35 33.5 40 X. 24.5 28.5 26.5 24 28.5 25.5 25.5 25 22 30 24 23.5 XI. 19.5 26.5 14 30 42.5 2.5 21.5 30 22.5 33 25.5 24 29.82 29.50 28.18 29.59 35.64 23.36 28.91 26.91 29.64 30.05 27.50 29.96 Indiv. Aver. 5 10 I. 25.58 24.62 II. 27.33 30.16 III. 12.50 11.50 IV. 34.41 35.66 V. 39.54 43.00 VI. 22.00 27.95 VII. 40.75 35.37 VIII. 19.87 20.83 IX. 35.04 40.70 X. 23.45 26.41 XI. 24.83 22.95 27.75 29.15 5: refers to object exposed 5 seconds. 10: refers to object exposed 10 seconds. General average: (5), 27.75 sec.; (10), 29.15 sec. _Series No. VII._--The object of this series was to determine the effect in ideation of exposing for unequal lengths of time the two objects compared. The figures compared were of the same area and outline, and were distinguished only by their color, one being red and the other green. These colors were employed, after a preliminary test, as showing, on the whole, to nearly equal advantage in the individual choice of colors. The shorter exposure was five seconds and the longer exposure ten seconds. The color that was to be seen the longer time was exposed first alone; after five seconds the other was exposed; and then both were seen for five seconds together, so that neither might have the advantage of the more recent impression. The two colors were regularly alternated, and in one half of the series the longer exposure was to the right, in the other half to the left. The extra five seconds were thus in each case at the beginning of the experiment.