158 DR HUGH ROBERT MILL ON THE CLYDE SEA AREA. 



observations would be helpful or necessary that I think it best to postpone the more 

 theoretical considerations until a time of greater leisure arrives, or a better-equipped 

 physicist feels prompted to build on these foundations. My effort has been to suggest 

 ways in which the data could be handled so as to draw from them only the general 

 principles which they unmistakably suggest ; and I believe that I have employed no 

 theory in this process which could vitiate the resulting conclusions. If, in the 

 endeavour to avoid error, I have failed to arrive at the whole truth, doubtless others 

 bolder and more skilful wil lfind it worth their while to work over the unexhausted slao;- 

 heaps. May they be rewarded by much reducible ore ! 



