divided into three types: (1) Two weights on each of two fingers, as
_A12 B12, C12 D12_, etc., (2) four in a line across the fingers, _A1
B1 C1 D1_ or _A2 B2 C2 D2_, (3) unsymmetrical arrangements, as _A1 B2
C1 D2_, etc. Arrangements of the first type were practically never
overestimated. _B12 C12_ was overestimated once and _B12 D12_ was
overestimated once, but these two isolated cases need hardly be taken
into account. Arrangements of the second type were but rarely
overestimated--_A2 B2 C2 D2_ practically never, _A1 B1 C1 D1_ a few
times. Once the latter was called eight. Apparently the subject
perceived the line across the hand and thought there were two weights
on each finger instead of one. Arrangements of the third type were
practically never underestimated, but were overestimated in 68 per
cent. of the cases.

These facts in themselves are suggestive, but equally so was the
behavior of the subject while making the answers. It would have hardly
done to ask the person if certain combinations were hard to judge, for
the question would serve as a suggestion to him; but it was easy to
tell when a combination was difficult without asking questions. When a
symmetrical arrangement was given, the subject was usually composed
and answered without much hesitation. When an unsymmetrical
arrangement was given he often hesitated and knit his brows or perhaps
used an exclamation of perplexity before answering, and after giving
his answer he often fidgeted in his chair, drew a long breath, or in
some way indicated that he had put forth more effort than usual. It
might be expected that the same attitude would be taken when six or
eight contacts were made at once, but in these cases the subject was
likely either to fail to recognize that a large number was given or,
if he did, he seemed to feel that it was too large for him to perceive
at all and would guess at it as well as he could. But when only four