2()6 



EXPERIMENTS WITH 



deal. Experiment 3, as well as some of tliose recorded 

 previously, seemed to show that ants were little guided 

 in such cases by the position of smrounding objects. 

 However, I was anxious to test this. 



7. Accordingly I took a round box and placed it 

 upside down on the table, having cut two niches, one 

 at each side, where it lay on the paper path, so as to 

 afford a passage for the ants, as in the experiments 

 recorded in my previous paper ; but on this occasion I 

 left the lid on, cutting, however, a hole through which 

 I could watch the result. In this case, therefore, the 

 surrounding objects, i.e. the walls of the box, turned 

 round with the table. Then, as before, when the ants 

 were between i and D, I turned the table half round. 

 The results were as follows: — 



In this case, then, only 11 ants turned; and as 4 

 of them were together, it is possible that 3 simply 



