164 EXPERIMENTS TO TEST 
similar results. The details will be found in the 
Appendix, but need not be given in full here. 
I then tried the following experiment :— 
In figure 3, a is the ants’ nest, 0 the door of 
the nest. Mm is the sectiori of a pole on which the 
whole apparatus is supported. B is a 
board 2 feet long; c, D, E, and F are slips 
of glass connected with the board B by 
Fig. 3. 
narrow strips of paper G, H, I K is a 
movable strip of paper, 14 inch long, 
i connecting the glass ¥ with the strip H; 
‘ and L is another movable strip of paper, 
‘a as nearly as possible similar, connecting 
Handi. On each of the slips of glass c 
and F I put several hundred larve of L. 
Mw flavus. The object of the larvee on c was 
to ascertain whether, under such circum- 
stances, other ants would find the larve acci- 
dentally ; and I may say at once that none 
fe -€ didso. I then put an ant (4), whom I 
had imprisoned overnight, to the larve on F. She 
took one, and, knowing her way, went straight home 
over the bridge K and down the strip oH. Now it 
is obvious that by always causing the marked ant 
(a) to cross the bridge K on a particular piece of 
paper, and if at other times the papers K and L were 
reversed, I should be able to ascertain whether other 
ants who came to the larve had had the direction 
and position explained to them ; o1 whether, having only 
