522 



PROCEEDINGS OF THE ACADEMY OF 



[Oct., 



The Maze. 



The floor of the maze was a pane of clear glass laid ujiou white cardboard, 

 upon which the runs were indicated by letters and figures. The runs were 

 twelve milliineters or a half inch wide, and Avere separated by W'alls twelve 

 millimoteis high and twelve millimeters thick, built of strips of glass closely 

 joined to one another and 1o the floor by LePage's liquid glue, and dried 

 during several months before the nia/e was used in experiment. Tlie walls 

 were topped liy a layer of cotton wadding which was removed and renewed 

 whenever the maze was cleaned for a new exp-riment. The roof, laid upon 

 the wadding and closing the maze at the top, was a square of thin clear 

 glass diagonally divided across «''-&■', for convenience in uncovering only 

 half the maze at a time. Effort, was made to secure the same degree of light, 

 warmth and humidity in every ])art of tlie maze. 



At / a straight glass tube seven centimeters long communicated with a 

 small nest in which the ant household used in the experiment had been 

 long established. The tube i, as well as the nest, was completely darkened, 

 and was opposite the source of light. 



At 7 a glass tube, bent upward at its outer end, gave ingress to the ants 

 from n)y hand and was stopped by a plug of cotton when not in use. 



The distance from 7' to / was twenty-one centimeters, a little more than 

 eight inches. 



