ACTIVITY OF THE ALBINO RAT 



27 



activity exhibited at the different ages. Owing to the device 

 which recorded the number of revolutions it is very easy to 

 estimate the distance run each day during the life time. Since 

 the change is so gradual and a computation of each day would 

 be so voluminous I have considered computations made once 

 each month sufficient to represent correctly the change in the 



TABLE I 



Average Daily Revolutions at Ages Indicated 



Age in Months 



Rat No. 1 



(Male) 



Rat No. 2 

 (Male) 



Rat No. 3 



(Female) 



Rat No. 4 



(Male) 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



14 



L5 



16 



17 



is 



HI 



20 



21 



22 



23 



24 



25 



26 



27 



28 



29 



30 



31 



32 



33 



34 



35 



348 



1200 



790 



5028 



1206 



540 



1307 



2084 



6002 



2616 



3620 



2186 



3860 



3860 



1428 



1006 



2684 



744 



996 



806 



690 



336 



1696 



380 



94* 



1002 



1124 



886 



5850 



3930 



1644 



3144 



3274 



7574 



4398 



2096 



4258 



7066 



6374 



4768 



2642 



4776 



2364 



2476 



2056 



1520 



1810 



1680 



1352 



1466 



188 



160 



180 



72 



56 



28* 



620 

 2118 

 1956 

 5782 

 7280 

 8482 



10185 

 9518 

 8930 

 8260 

 8640 

 8902 



11044 



10992 

 8198 



13002 

 5982 

 9732 

 8312 

 9658 

 3210 

 5468 

 3188 

 3100 

 4612 

 2538 

 1968 

 5171 

 2424 

 2832 

 1706 

 2312 

 488 

 435 

 60* 



448 



1336 



1832 



6620 



834 



540 



3574 



4276 



2836 



2882 



2310 



2616 



3084 



3004 



2556 



1364 



1998 



1512 



808 



720 



482 



290 



456 



220 



196 



48* 



* The number of revolutions made during the 24 hours previous to the death 

 of the animal. 



