152 SCIENCE AND THE HUMAN MIND 



open question how far this change is due to the numeri- 

 cal expansion of the nation and its reorganization on 

 lines of industrial efficiency, which would provide 

 greater opportunities for intermarriage between the 

 different sections of the community, and thus tend 

 to enlarge, though possibly to dilute the quality of, 

 production. Or it may be that science itself has 

 changed, at least in one direction, and that the marvel- 

 lous and successful application of its principles to in- 

 dustrial operations has required the co-operation of a 

 new type of man, with a mind and body having an 

 instinctive grasp of mechanical processes and technical 

 skill wherewithal to apply the theoretical discoveries 

 of the workers in pure science. 



In the succeeding age, to which we must now turn, 

 this process proceeds apace ; and science, hitherto with 

 little message for the practical arts, unless therein we 

 include medicine, opened wide the doors of technical 

 application, and revolutionized the external circum- 

 stances of the life of mankind, just as, in the period 

 we have just brought to a close, it had transformed 

 the mental outlook. 



