| | | | | | | | | |
| | | | | | | | | | | {8.6.3.3 | | | | |
27 | 71- 80 | 7.6.5 | 7 | 2.1 | 1.5.6 | 8.7.6.4 | 8 | 2 | 5 | 9.8.7.6.3 | {7.5.3.8 | 4 | 6 | 4 | 6 | 1:1.50
| | | | | | | | | | | {3.6.9* | | | | |
| | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | |
28 | 81- 90 | 7.6.7.5 | 7 | 3.1 | 6 | 8.6.4 | 4.8 | 2 | 2.4.5 | 8.7.4.3 | 3.8.9 | 3 | 7 | 3 | 7 | 1:2.33
| | | | | | | | | | | | | | | |
========+===========+==============+==============+==============+==============+==============+==============+==============+==============+==============+==============+===+===+===+===+========

[Footnote *: Aided by experimenter.]

2. Sobke, _Pithecus rhesus_

_Problem 1. First at the Left End_

Sobke was somewhat afraid of the experimenter when the investigation was
undertaken, and instead of willingly coming out of his cage when the
door was raised, he often had to be coaxed out and lured into the
apparatus with food. Whereas Skirrl was frank and rather aggressive,
Sobke was stealthy in his movements, furtive, and evidently suspicious
of the experimenter as well as of the apparatus. He was perfectly safe
to approach, but would not permit anyone to touch him. After a few days,
he began to take food from the hands of the experimenter.

Preliminary work to acquaint this monkey with the routine of the
experiment was begun on April 13. As in the case of Skirrl, he was lured
into the apparatus and was taught the