222 EVOLUTION 



head, and hand ; and each calling out the 

 others to fuller expression and development. 



Concretely, how can this dream of individual 

 development so important for the progress of 

 science, the reading of evolution, be actually 

 applied and brought about ? So far as the 

 sciences are concerned and these are com- 

 monly esteemed the most difficult the prin- 

 ciple of its applications are clear. While the 

 services of each science to practical life are 

 constantly insisted on, and in no danger of 

 being overlooked, we far more often and readily 

 forget the rise of each science from practical 

 life. But the historic beginnings of geometry 

 with measurement are again in progress in 

 the schools. Those of astronomy with naviga- 

 tion have long been well taught to the sailor 

 youth, and now the boy scout is learning, like 

 his pastoral ancestors, to find his time by 

 the sun, his way by the stars. Nor is this a 

 matter of elementary education merely; here 

 lies the main progress of research also, that 

 higher education of the individual and the 

 race together. Thus the problems of daily 

 life, the emergencies of practice, called out 

 the highest powers and achievements, from 

 Archimedes of old to Kelvin yesterday. 



For fuller illustration whether we state 

 on principle more abstractly (as the rise of 



