Trans. Roy Soe. Edin. 



SIMPSON AND GALBRAITH: NORMAL TEMPERATURE OF THE MONKEY AND ITS DIURNAL VARIATION. 



APRIL S c !" 



23™ 2#«* 25!* APRIL 



Period IV. (continuous darkncwi). 



Period V. (continuous light), 



i 6, Adult— (red line); C— Macacos rhoesus 9- Immature— (blue line); — Mai acos cyanomolgua 6, Aged— (green line). 



- Temperature curvca obtained from monkeys B.-.-Mncneus rhoesus o, Adult— (red line); C— Macacua rhoesus 9, Immature— (blue line); — Mai oc 



The shaded bands at the bottom of the Chart indicate the normal periods of rest as previously determined, while Ihe periods of darkness artiflcii illy imposed upon the monkeys are represented by t 



Observe that the apices of the curvca nru found In the unshaded parte »t the tap (periods of activity) whether their correspond with the natural day or not. 

 The black band at the top In period VI. Indicates the time during which the monkeys were not fed. 



