436 SCIENCE PROGRESS. 



ing ; I think I have rather raised it. For once again are 

 we met by the fact that Science may never recognise 

 bounds to her progress, and that amidst the struggles for 

 some new possession her eyes must not become blinded to 

 the fact that beyond the territory she is striving to conquer 

 still wider plains extend which later must also be subdued. 

 Let us have done with the time when the smoke and dust 

 of battle confined our vision to the narrow limits of the 

 combat. To-day that is no longer allowed ; to-day we fire 

 with smokeless powder — or rather ought to do so — and 

 have, therefore, with the possibility, also the duty not to 

 fall into the errors of past periods. 



WlLHELM OSTWALD. 



