36 
ANIMAL INTELLIGENCE. 
and so arranged that the ants in going straight from it to 
the nest would reach the board at the point 6, and after 
passing under the paper 
tunnel c , would proceed 
between five pairs of 
wooden bricks, each 3 
inches in length and If 
inches in height. When 
they got to know their 
way they went quite 
straight along the line d e 
to a. The board was then 
twisted as shown in Fig. 4. 6 The bricks and tunnel being 
arranged exactly in the 
same direction as. be- 
fore, but the board 
havingbeen moved, the 
line d e was now out- 
side them. The change, 
however, did not at all 
discompose the ants; 
but instead of going, 
as before, through the 
tunnel and between 
the rows of bricks to 
<x, they walked exactly 
amng the old path to e.’ Keeping the board steady, but 
moving the brick pathway 
to the left-hand corner of 
the board where the food 
was next placed (Fig. 5), 
had the effect of making 
the ant first go to the old 
position of the food at a, 
whence it veered to i new 
position, which we may 
call x . The bricks and 
lgo 9 food were then moved to- 
wards the right-hand corner of the board — i.e . over a dis- 
tance of 8 inches ^Fig. 6). The ant now first went to a. 
Fig. 4. 
