THE EVOLUTION OF THE UNIVERSE 21 



of millions of years and then die, to be born and glow 

 again. ^ 



I What about Einstein's theory, which, some tell you, does not 

 admit ether? As a matter of fact, it admits a different kind of 

 ether, in which light does not travel in straight lines, and it gives 

 a new idea of gravitation. Einstein's theory cannot be popularly 

 explained, as every scientist who has tried to do it admits. The 

 best attempts are an article by Sir Oliver Lodge in the Nineteenth 

 Century, December, 1919, and an article by Professor Eddington 

 in the Contemporary Review for the same month. It is a matter 

 of the highest mathematics, and, even if it were ever proved 

 (which is doubtful), it will not modify the ordinary teaching of 

 science as much as some say. 



