x SOME EXPERIMENTAL RESULTS 193 



but I cannot think of anything in Jack's previous behaviour 

 which would suggest that it would have had this effect on 

 him. My lightly touching the string might, I think, have 

 led him to smell at it, and possibly to paw at it. I know 

 nothing to suggest that it would have led him to bite it, 

 and it therefore seems to me to have acted as a suggestion 

 or reminder of what he had just done. On the whole, the 

 impression left on me is that Jack learnt this trick by 

 perception of result plus suggestion. 



(2). String on banisters. 



After teaching Jack the previous experiment, I tied a 

 string to the banisters of the landing, and hung to it a 

 little tin toy bucket containing meat. I passed the string 

 round the next banister to the one to which it was tied, so 

 that by pulling the string between the two, he could get 

 the bucket up. I will give Jack's full record for this 

 experiment, as it is a little interesting. 



1. In showing Jack the arrangement his paw got twisted in 

 the sting. I notice this point as possibly helping to suggest 

 pulling to him. As soon as I put meat in, and dropped bucket, 

 Jack ran downstairs to see if he could get it from there. He 

 then came back and tugged at string, but, taking it near the 

 place where it is tied, he only pulls at the post, so to say, and 

 there is no tendency to pull bucket up. I encourage him a little, 

 but without result. I then alter string by passing it over three 

 or four posts, so that if he seizes it at the further end from place 

 where it is tied, and then backs away from banisters, he can get 

 it. Having altered it, I partly pull it up from right place, where- 

 upon Jack seizes string and gets food. 



2. He pulled at once, but string slipped, and he failed. I then 

 pointed to right place, whereupon he pulled again. Bucket stuck 

 just at top ; I pulled it in, and meat had tumbled out, so I gave 

 him a piece. (The bucket was very apt to catch in ledge made 

 by floor ; it was not very easy to get meat out.) 



3. Jack again pulls, without waiting for a sign, but fails to 

 back far enough, and bucket slips down. He tries again and 

 fails. I pull it up for him. 



4. After some delay Jack succeeds, backing better this time. 



5. Slight delay ; then success. 



6. First trial pulls it nearly up, and then misses. After some 

 encouragement, tries again, and succeeds. 



Next day. 



I. Jack makes two or three attempts ; is uncertain as to right 



o 



