150 L. B. NICE 



the mice and at the end of the experiment equalled the controls 

 in weight it appears that they grew normally. One mouse died. 



These mice were the least active of all the lines, their total 

 activity being 68 per cent of that of the controls. Three were 

 below the average in activity and one was above. 



Caffeine seems to have had no influence on the growth of three 

 of the mice, but apparently had an injurious effect on one mouse, 

 resulting in its death. 



CafTeine seems to have greatly lessened the activity of these 

 mice. 



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