9 



SURPRISES OF SCIENCE. 



In the British Association there is the freest expression of opinion. The 

 most treasured notion is attacked without remorse. In this liberty lies the hope 

 of succeeding in the search for truth. N WP . r h as this been more clearly seen 



SIR WILLIAM DAWSON 

 President B. A. S. (1886). 



than in the Presidential address this year (1906) in York of Dr. Ray Lankes- 

 ter. There is no attempt to form a dogmatic science. If a thing is false, if cre- 

 dence has been given to an ill-considered judgment or opinion, it is without the 

 slightest regret abandoned. This is the true spirit of research. Dr. Lankester 

 discusses with evident delight the discoveries made of radium and the radio- 

 activity of a number of oth^r metals. Hs announces that " after a year and 

 six weeks a grain of radium has emitted enough heat to raise the temperature of 



