Energy in Animals 45 



the kind and amount of work performed 

 and the time in life when the performance 

 occurred, are essential to the determination 

 of what possible effect his accumulated 

 energy may have on his descendants. 



Although expending energy through an 

 organ concentrates energy in that organ, the 

 concentration does not occur immediately 

 upon the expenditure. A little time is re- 

 quired to produce the physiological result of 

 concentration within the organ. Likewise, 

 if a physiological result in an organ be re- 

 flected in the germ so that concentrated 

 energy may be transmitted to the next gen- 

 eration, that fact would require the lapse of 

 some time. Consequently, in applying the 

 facts of pedigree records to test the theoreti- 

 cal conclusions previously given, there should 

 be a certain time allowance between the 

 work performed and the beginning of the 

 reproductive process. What this time allow- 

 ance is, is not known, and probably it would 

 be difficult to determine it because of the 

 complexities involved, but it has been roughly 



