128 K. S. LASHLEY AND JOHN B. WATSON 



up a piece of paper and spring up and back from it again and 

 again. Tried to interest mother in the game. Struck at her 

 with left fore foot and then sprang on paper and partially rolled 

 over on it much as a kitten does. Picked up a piece of roll 

 from yard with fore paw and put to mouth and bit off small 

 piece, reached up with left hind foot and grasped it much as 

 the adults do. Came to opening and bit off piece of banana, 

 chewed it with effort and swallowed some of it. Caught clear 

 view of mouth. Both upper and lower incisors are cut and 

 evenly grown but no molars either in upper or lower jaw. 



No sign of sex interest even in play. Seems never to be 

 interested in sex organs. Yesterday mother went over him for 

 nearly half an hour, carefully picking over sex organs. No 

 evidence cf tumescence cr cf movements indicative of sex 

 impulses. 



Was very venturesome in climbing today. Climbed up the 

 sides of Jhe fence for three feet — came down, then went to top 

 of fence and climbed with body inverted along top of fence. 

 Got frightened. Twice essayed to get back to sides of fence, 

 hanging suspended with three feet while groping for sides of 

 fence with other. Although he could easily make it he could 

 not gather courage to release the three feet attached to the 

 overhead netting. Finally cried and mother climbed up, grasped 

 him by back of neck and easily pulled him into position. These 

 release movements of digits do not seem well co-ordinated. 

 Often in attempting to climb down from netting the tees and 

 fingers fail to release promptly. 



September 5. Noticed use of cheek pouches for first time. 

 Was eating rolls, and apparently with relish began stuffing into 

 pouch with all the vigor of an adult. 



September 7. Ninth week. 



Eating much larger quantities of food but still nursing a£ 

 vigorously as ever from mother. Ate almost a quarter of a 

 banana. Gave it in small quantities from my finger. Had 

 good opportunity to investigate teeth. No appearance yet of 

 molars. For the first time he used fingers almost exclusively 

 for picking up food. Picking up small bits nearly everywhere. 

 Hitherto his grasp has been insecure. Still there is a long latent 

 period both in closing and in releasing. Shown when I gave 



