286 



WALTER S. HUNTER 



second blind alley is the same in each. Blind alley no. 3 in B 

 corresponds to free passageway in A and necessitates a turn 

 to the left in order to avoid it, — the passageway in A is made 

 by a turn to the right. Blind alleys nos. 4, 5 and 7 in B have 

 no corresponding ones in A. They were very seldom entered, 



cent 



125 





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Figure 5 — Graphs from the data of table III, labyrinth B. T, the time curve; 

 E, the error curve. 



but served to confuse the pigeon by a multiplicity of possible 

 pathways. Especially when a bird was approaching alleys nos. 

 5 and 6, where three possible pathways were presented, it would 

 pause and peer into each. Blind alley no. 6 in B is paralleled by 

 the open alley to the food box in A. Among these alleys in B, 

 nos. I, 3 and 6 were those which occasioned the greatest dififi- 

 culty in learning. 



