RADIATION 1 79 



own parts, the sea waves, which cannot subside without 

 producing heat, finally resolve themselves into waves of 

 ether, thus regenerating the motion from which their tem- 

 porary existence was derived. This connection is typical. 

 Nature is not an aggregate of independent parts, but an 

 organic whole. If you open a piano and sing into it, a 

 certain string will respond. Change the pitch of your 

 voice; the first string ceases to vibrate, but another re- 

 plies. Change again the pitch; the first two strings are 

 silent, while another resounds. Thus is sentient man acted 

 on by Nature, the optic, the auditory, and other nerves of 

 the human body being so many strings differently tuned, 

 and responsive to different forms of the universal power. 



