102 UNIVERSITY OF MISSOURI BULLETIN 



years ago. The definition required by that theory was that 

 a homogeneous substance is a substance composed of grains 

 all of one kind ; in place of grains we now say systems of 

 electrical doublets. 



"The great principle which underlies all the speculation 

 of the Early Cosmologists, though it is first explicitly laid 

 down by Parmenides, is that nothing comes into being out of 

 nothing, and nothing passes away into nothing. They saw, 

 however, that particular things were always coming into being 

 and passing away again, and from this it followed that the 

 existence of particular things was no true or stable existence. 

 The only things that were real and eternal were the original 

 matter which passed through all these changes and the mo- 

 tion which gave rise to them." 



This is our position to-day, whether the "original matter" 

 be the "corpuscle" or not. 



With Tennyson we can say, 



"Yet I doubt not thro' the ages one increasing 

 purpose runs, 

 And the thoughts of men are widen'd with 

 the process of the suns." 



