| Table of Contents | |
| Section | Page |
| Start of eBook | 1 |
| I | 1 |
| EXPLANATION OF PLATE II | 3 |
| II | 4 |
| EXPLANATION OF PLATE IV | 7 |
| PROBLEM 1. First mechanism at left of group | 11 |
| 12 | |
| Settings for Control Experiments | 12 |
| PROBLEM 2. Second from right end | 13 |
| PROBLEM 4. Middle | 13 |
| III | 14 |
| TABLE 1 | 16 |
| TABLE 2 | 23 |
| TABLE 3 | 38 |
| TABLE 4 | 43 |
| TABLE 5 | 47 |
| TABLE 6 | 54 |
| TABLE 7 | 63 |
| TIME FOR SERIES OF TRIALS | 69 |
| TABLE 8 | 71 |
| CONDITIONS OF EXPERIMENT FROM DAY To DAY FOR PROBLEM 2 | 78 |
| TABLE 9 | 80 |
| TABLE 10 | 102 |
| IV | 104 |
| EXPLANATION OF PLATE V | 105 |
| V | 125 |
| VI | 130 |
| VII | 137 |
| SUB-DIVISIONS OF THE ORDER PRIMATES | 138 |
| VIII | 145 |

