164 



EXPERIMENTS TO TEST 



Fig. 3. 



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, o the door of 

 the nest. M is the section 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 

 narrow strips of paper G, H, i. K is a 

 movable strip of paper, 1 inch long, 

 connecting the glass F with the strip H ; 

 and L is another movable strip of paper, 

 as nearly as possible similar, connecting 

 H and I. On each of the slips of glass c 

 and F I put several hundred larvae of L. 

 flavus. The object of the larvae on c was 

 to ascertain whether, under such circum- 

 stances, other ants would find the larvae acci- 

 dentally ; and I may say at once that none 

 did so. I then put an ant (A), whom I 

 had imprisoned overnight, to the larvae on F. She 

 took one, and, knowing her way, went straight home 

 over the bridge K and down the strip H. 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 larvae had had the direction 

 and position explained to them ; or whether, having only 



