276 the president's address. 



cannot be infallible, but can progress only by a process of natural 

 selection, in the course of which one hypothesis replaces another 

 in the struggle for existence. The buckets in which we draw up 

 truth from the bottom of the well are very small and very leaky, 

 and a good deal that is not truth finds its way into them before 

 they reach the surface. Fortunately the impurities, even if they 

 cannot be eliminated at once, sooner or later sink to the bottom 

 and leave the water clear. 



Journ. Quekctt Microscopical Club, Scr. 2, Vol. XII., No. 74, April 1914. 



