GUIDED BY SIGHT. 273 
two. I then moved ittom’. 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 18 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 
