46 

 the efficiency of skeletal muscles directly, or "by in- 



creasing the "blood pressure and thereby bettering the 

 circulation. Concomitant with adrenalin secretions 

 glycosuria also takes place. There seems to be a 

 chemical integration whereby sugar would supply energy 

 and adrenalin would obviate fatigue in the muscles by 

 improving the circulation. The ability of the rats to 

 continue prolonged effort during the excitable state 

 can thus, in a measure, be accounted for, as can also the 

 numerous movements made. There are metabolic changes 

 in the organism which tend to foster the latter. 



The eaarly irregularities of the curves before the 

 rapid descent takes place can be accounted for as repre- 

 senting the entire process of early organization of 

 movements. It is the time when there is a reduction of 

 some movements and the facilitation of others. The 

 "steeple like" character of the curves shows how difficult 

 the organization must bo. As soon as the early movements 



