GUIDED BY SIGHT. 273 



two. I then moved it to m". Two ants came together. 

 One found the pillar in 7 minutes ; the other took no 

 less than 25, although, as already mentioned, the table 

 was only 1 8 inches in diameter. Obviously, therefore, 

 though it seems clear that they are helped by sight, still 

 these last observations support those previously re- 

 corded, and show that in finding their way they do 

 not derive by any means so much assistance from their 

 eyes as we should under corresponding circumstances. 



