flat Pt 4.9 seconds. Heither the inbred nor the B curvea flat- 

 ten entirely, althou^''^ the B oirve is more rejjular than that 

 of the inbred3. The curve of relearnintj (without the two in- 

 breds and one B that failed to learn) of all three nearly co- 

 incides. But here the inbred rernains slit^htly above, and the 

 (-B) slightly below the curve of the B. 



