216 THE PRINCIPLES OF SCIENCE. 



the careful recording and investigation of all such discre 

 pancies. In no part of physical science can we be free 

 from exceptions and outstanding facts, differences and 

 discrepancies of which our present knowledge can give no 

 account. It is among such anomalies that we must look 

 for the key to wholly new realms of facts worthy of 

 discovery. They are like the floating waifs which led 

 Columbus to suspect the existence of the new world. 



