i6 



EFFECT OF DIET ON THE ALBINO RAT 



the omnivorous. This is seen by consulting Table V, which represents 

 the averages of each sex of these two groups. 



From this I think one of two conclusions may be reached. Either 

 the sudden reduction in the rich protein food of the omnivorous rats 

 to almost a vegetarian diet (meat being given only two or three 

 times a week) has had the effect of checking the activity of all alike, or 

 a strictly vegetarian diet at this age is conducive to a slightly greater 

 activity. If the latter is true it may be explained in this manner: The 

 omnivorous rat had a satisfying diet; the vegetarians did not, and ran 



mooooor 



ow 



SQOOOOO 



/' 



MOOOOB 



AgcfaiHonthf 



Fig. 12. Curves showing the average total work and the rate it was done of each sex 



of exercised omnivorous and vegetarian feeders. The heavy solid line 



(OEM) represents the work of the omnivorous males, the heavy 



dotted line (OEF) the omnivorous females ; the light solid 



line {VEM) the vegetarian males, the light dotted 



line {VEF) the vegetarian females. 



