was repeated later in the day with the same result. Record:—By himself, 10 F. Put through 80 times. F 65 (a) [the (a) refers to a note of his unrepeated chance success with his head]. No similar act unsuccessfully attempted. Influence of tuition, none. With the chute mechanisms the record would be of the same nature. With them I put the animal through generally by taking his paw, held out through the wire netting of the cage, and making the movement with it. In one experiment (No. 3 with QQ chute) the first 58 trials were made by taking the monkey outside the cage and holding him instead of having him put his paw through the netting for me to take. Many of the experiments were with mechanisms which had previously been used in experiments concerning the ability to learn from seeing me operate them. And the following Table (12) includes the results of experiments of both sorts. The results of experiments of the ‘on chair’ type are in Table 13. In cases where the same apparatus was used for both purposes, the sort of training which was given first is that where an A is placed. In the first four experiments with No. 1 there was some struggling and agitation on his part while being held and put through the act. After that there was none in his case except occasional playfulness, and there was never any with No. 3 after the first third of the first experiment. The monkeys soon formed the habit of keeping still, because it was only when still that I put them through the act and that food resulted. After you once get them so that they can be held and their arms taken without their clinging to you, they quickly learn to adapt themselves to the experiments. With No. 1, out of 8 cases where he had of himself failed (in five of the cases he had also failed after being shown by me), he succeeded after being put through (13, 21, 51, 10, 7, 80, and 10 times) in two cases (QQ (chute) and RR (wood plug). The act was unlike the one taught him in the former case. TABLE 12 Table headings: Column A: SUBJECT. DATE. ACT Column B: TIMES TRIED ALONE, WITH RESULT Column C: NUMBER OF TIMES ATTENTION ATTRACTED Column D: RESULT Column E: NUMBER OF TIMES SHOWN BY ME Column F: RESULT IN TRIALS AFTER BEING SHOWN BY ME Column G: NUMBER OF TIMES PUT THROUGH THE ACT Column H: RESULT IN TRIALS AFTER BEING PUT THROUGH THE ACT Column I: COMPARISON OF ACT USED WITH ACT TAUGHT Column J: SIMILAR ACT ATTEMPTED THOUGH UNSUCCESSFULLY Column K: ACT DONE ONCE OR MORE, BUT NOT REPEATED IN SPITE OF REPEATED TUITION