METHODS OF STUDYING VISION IN ANIMALS 



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69 



Figure 12 — A schematic drawing of the mechanism for rotating the episcotister 

 table. The rotating table of fig. 11 is marked here by the number 74. The 

 shaded circular area represents the drum S of the previous figure. The motor 

 is indicated by M, the sectors by P and K, the cord system by 80 and 89. A 

 shows the method of attaching the cords; B, C and D show the different posi- 

 tions of the sectors. 



