AND INDUSTRY 21 



firmly based below. Science is like a tree 

 also in this that both need wise cultivation. 

 The nourishment of the tree, its training and 

 pruning, have their counterparts in the de- 

 velopment of science ; in both cases the fruit 

 comes as the reward of skill and labour. This 

 is the thing which is hard to understand and 

 yet is so important/' This is the fact which 

 it is essential for Cambridge to grasp and to 

 impress upon the Nation. 



The great discovery is usually small in its 

 beginnings, it does not at first strike the im- 

 agination. The seeds from which the revolu- 

 tion is to come lie hidden in the ground, and 

 the tiny sprout which first appears seems but 

 of small importance. Few besides some stu- 

 dents in the Universities realised the wide- 

 reaching scope of Maxwell's theory of the 

 electromagnetic field, when it was first pub- 

 lished; few again pictured, when they read 



