HABIT FORMATION IN ALBINO RATS 



35 



TABLE Vb 

 The Inclined Plane 

 Average Absolute Retention of Inbred and Normal Control Rats 



Absolute Retention 

 After 60 Days' Rest 



Inbred Average 31 . 842 seconds 



Control Average 22 . 587 seconds 



TABLE Vc 



The Inclined Plane 



Daily Relearning Averages of Inbred and Normal Control Rats 



(Time in seconds) 



Day 1 



Inbred Average 41 . 789 



Control Average 22 . 598 



Day 6 



Inbred Average 5 . 175 



Control Average 3 . 057 



Day 11 



Inbred Average 3 . 508 



Control Average 2 . 929 



Day 16 



Inbred Average 2 . 610 



Control Average 2 . 776 



Day 21 



Inbred Average 2 . 607 



Control Average 2 . 586 



Inbred Average. . 

 Control Average. 



TABLE Vd 



The Inclined Plane 



Anatomical Data of Inbred* and Normal Control Rats 



Brain 

 Weight 

 in grms. 

 1 . 72083 

 1.81840 



Body Body 



Length Weight 



in mm. in grms. 



Inbred Average 195 , 93 184 . 37 



Control Average 194 . 43 189 . 18 



Water Per cent 



in Cord, Brain Weight 



per in Relation to 



cent Body Length 



Inbred Average 71 . 437 . 87972 



Control Average 71.223 .93474 



Cord 



Weight 



in grms. 



. 53787 



.53922 



Per cent 



Brain Weight 



in Relation to 



Body Weight 



.97889 



1.00275 



Water 



in Brain 



per cent, 



78.363 



78.319 



Age 

 killed, 

 Days 



220 

 194 



