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CAMBRIDGE: 1938 



THE PRESIDENTIAL ADDRESS 



PART I 



VISION IN NATURE AND VISION 

 AIDED BY SCIENCE 



PART II 



SCIENCE AND WARFARE 



BY 



The Rt. Hon. LORD RAYLEIGH, Sc.D., LL.D., F.R.S. 



PRESIDENT OF THE ASSOCIATION. 



I. 



Vision, and its Artificial Aids and Substitutes. 



The last occasion that the British Association met at Cambridge 

 was in 1904, under the presidency of my revered relative, Lord 

 Balfour, who at the time actually held the position of Prime Minister. 

 That a Prime Minister should find it possible to undertake this 

 additional burthen brings home to us how much the pace has 

 quickened in national activities, and I may add, anxieties, between 

 that time and this. 



Lord Balfour in his introductory remarks recalled the large share 

 which Cambridge had had in the development of physics from the 

 time of Newton down to that of J. J. Thomson and the scientific 

 school centred in the Cavendish Laboratory, ' whose physical 

 speculations,' he said, ' bid fair to render the closing year of the old 

 century and the opening ones of the new as notable as the greatest 

 which have preceded them.' It is a great pleasure to me, as I am 

 sure it is to all of you, that my old master is with us here to-night. 



