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JOHN LINCK ULRICH 



ance with the degree of reflex excitability manifest, two kinds 

 of tables are presented. Table 10 gives the record of 24 rats. 

 In this table will be found for each rat the trial when direct 

 progression to the plane from the entrance box occurs for the 

 first tune, and the trial when progression is direct to the door 

 after the plane is plunged. In addition the trial in which direc- 



TABLE 10 



tive integration is facilitated is also stated. The degree of reflex 

 excitability existing in the first trial and a general statement of 

 the functional condition of the reflex thrust as observed through- 

 out learning is also given. Tables 11, 12, 13, 14, and 15 give 

 of 5 rats for 60 trials the reaction time for each part of directive 

 integration, the total time to solve the problem, the functional 

 condition of the reflex extensor thrusts of all limbs from trial to 



