20 THE ADVANCE OF SCIENCE 



practical mechanician, and the efficiency 

 of Bolton' s workmen had quite as much 

 to do with the realisation of his pro- 

 jects, 

 but in- In fact, the history of physical science 



byloveof teaches (and we cannot too carefully take 

 S^ 1 " the lesson to heart) that the practical ad- 

 vantages, attainable through its agency, 

 never have been, and never will be, suffi- 

 ciently attractive to men inspired by the 

 inborn genius of the interpreter of nature, 

 to give them courage to undergo the toils 

 and make the sacrifices which that calling 

 requires from its votaries. That which 

 stirs their pulses is the love of knowledge 

 and the joy of the discovery of the causes 

 of things sung by the old poets — the su- 

 preme delight of extending the realm of 

 law and order ever farther towards the 

 unattainable goals of the infinitely great 

 and the infinitely small, between which 

 our little race of life is run. In the 

 course of this work, the physical philoso- 



