45, 40, 45,
45, 50, 55


1. Parallel on arm.
2. Diverging on axilla.
3. Parallel.
4. Converging at waist.
Around neck.
25, 30, 30,
25, 20, 30


1. Parallel on ventral side; twice di-
verging slightly to, and converg-
ing from, median line.
2. Diverging to, and from, vertebral
prominence. Amount of diverg-
ence greater than in "1".
TABLE IX

Observer Bo. Leg-foot

Number of cases for each region, 6



Region explored


Distances


Summary of results


Dorsal side of leg:
near top of upper
to middle of
lower.
65, 70, 60,
75, 70, 70


1. Parallel to point beyond knee-joint

(twice, converging).
2. Slightly diverging to end.
Dorsal side of leg:
middle of lower
to toe.
30, 25, 40,
35, 30, 30


1. Parallel to near heel. (Once, di-

vergence at begiiming of ankle.)

2. Diverging to end. (Once, converg-

ing at instep: then diverging to
end.)



A STUDY OF WEBER'S ILLUSION 93

A comparison of Tables VI-IX with Tables I-IV shows
that, with the following exceptions, the illusions are the same
for these observers as for G. ( 1 ) For Bo, the lines were parallel
(instead of diverging) from ear to corner of lips; parallel
(instead of converging) over knee-joint, dorsal side; and
diverging (instead of parallel) over sole of foot. (2) For C,
the paths were converging (instead of parallel) from side to
breast, and parallel (instead of diverging and converging) over
ribs from axilla to near waist. (3) For D, they were parallel
(instead of diverging) on volar side of fingers. It will be
noticed that in none of these cases is there a reversal of
direction as regards convergence and divergence; and the
general agreement of all observers, including Weber, bespeaks
the stability of the illusion.
