20 



THOMAS WILLIAM BROCKBANK 



k 



TABLE I-B - 

 70-Day Period. 3 Trials per Day 

 " Errors "At Turns 

 Last 35 Trials of Learning; Complete Redintegration 



* 7 and 8 omitted in Table I-A due to incomplete records of " errors " in learning. 



Table III-A presents the total " errors " in both learning 

 and redintegration for the 3 trials per day rats of the 45- 

 day group. Rats 1, 2, 3, and 4 are from a litter of seven, 

 the remaining three of the litter being in the 70-day group. 

 In Table III-B rats 5, 6, and 7 are from a litter of six; 

 of the remaining three in the litter one failed to complete 

 the experiment and the other two are recorded in the 

 70-day group as 7 and 8. The dominance in " errors " of 

 both learning and redintegration in these tables confirms 

 the findings of the former tables. Table III-B is the 

 comparison of " error " totals of redintegration and the 

 last 30 trials of learning, which number was thought suffi- 

 cient for the 45-day retention period. These totals con- 

 firm those of Tables I-B and II-B. 



