I. (a) 2.  F. 80:—­(1) 24, (2) 50, (3) 68 70, (4) 80 85 94 95
    85, (5) 102 104 110 120 124 126 125* 132, (6) 187; also V.
    80:—­(2) 40 40, (4) 80, (5) 120 120, (6) 160 160.

    I. (a) 3.  F. 120:—­(1) 44 46, (2) 64 48 70 70, (3) 85 95 97
    91, (4) 113 113 118, (5) 168 169 178;—­44, X; also V.
    120:—­(1) 40 40, (3) 80 80 80, (4) 120 120, (5) 160 160.

    I. (a) 4.  F. 160:—­(1) 25 26, (2) 40 50 57, (3) 82 85 95 100*,
    (4) 114 115 130, (5) 145 145 156 162, (6) 196,
    (7)—­88*—­150*—­105.

    I. (a) 5.  F. 200:—­(1) 20 23 28 36, (2) 55, (3) 108 124 130*,
    (4) 171 189 199 195, (5) 220 230*, (6)—­46—­90—­110*.

On comparing the different groups, we find that in 1 and 2 there is a decided preference for a position somewhat less than half way between center and frame—­more sharply marked for 1 than for 2.  From 3 onward there is a decided preference for the mechanical arrangement, which would bring the larger strip nearer.  Besides this, however, there are groups of variations, some very near the center, others approaching to symmetry.  The maintenance of geometrical symmetry at a pretty constant ratio is to be noted; as also the presence of positions on the same side of the center as the fixed line.  Before discussing the significance of these groups we may consider the results of Experiment II. (F. double line 80x10, V. single line 80x10) without giving complete lists.

We notice therein, first of all, the practical disappearance of the symmetrical choice; for F. 40-60, 60-80, 80-100, a tendency, decreasing, however, with distance from the center, to the mechanical arrangement; for F. 100-120, and all the rest, not one mechanical choice, and the positions confined almost entirely to the region 35-75.  In some cases, however, the mechanical choice for (1) 40-80, (2) 60-80, was one of two, e.g., we have for (1) 20 and 138, for (3) 70 and 162; in the last two cases the mechanical being the second choice.

Now the reversals of the mechanical choice occur for Exp.  I. in 1 and 2 (F. 40 and F. 80); that is, when the small fixed line is near the center, the larger variable is distant.  For Exp.  II. the reversals, which are much more marked, occur in all cases beyond F. 40, F. 60 and F. 80; that is, when the double constant line is far from the center, the single variable approaches.  If the mechanical theory prevailed, we should have in Exp.  I. the lines together in the center, and in Exp.  II. both near the fringe.

From the individual testimony, based both on I. (a) and I. (b), it appears that subject M is perfectly uniform in mechanical choice when the fixed line is the small line—­i.e. when it moves out, the larger is placed near the center; but when the conditions of mechanical choice would demand that, as the larger fixed line moves out, the small variable one should move out farther, he regularly chooses the reverse.  Nevertheless, he insists that in just these cases he has a feeling of equilibrium.