DEVELOPMENT OF MODERN COMPARATIVE PSYCHOLOGY 



PLATE x 



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Specimens of Apparatus Devised by Lubbock 



Fig. I. Simple Problem Apparatus. The i 

 c-d, and dropping 0.3 in. at a: the wooden bio 



FlG. 1. Complex Insect Ha^e. The insect p 

 %-h-i, leading to larvae or food on the glass slic 



FlG. 3. Simple Elevated Insect Maze. Lai 

 supported on pins. 



FlG. 4. Complex Problem Apparatus {Top and Horizontal Sections'). By 

 Francis Gallon, the trail leading to larvae or food at m could be shifted at 

 box, or hood over the rotated section. 



t could secure access to the lai 



i from the nest, a, to the board, b, 2. feet long, and approached the 

 -d-e; movable pathways, k-l, with slide,/, complicated the pattern. 

 placed on columns, m-m'-m", 7 in. high, could be reached by 



the glass cell, p, only by climbing onto the wooden block, 



ig of paper strips, 



ig the paper pathways 



of thts 

 point: 



ig table, 18 in 

 ronment could t 



•, devised for Lubbock by 

 th trail by placing a round 



