1893.] on Economies in the Utilisation of Energy. 93 



invention, as it appears — not merely guessing at it, but actually 

 estimating its possible value numerically. For those of us who are 

 not born to be inventive geniuses there is always the consoling 

 thought that the difference between good engineering and bad 

 engineering in economy, with the very same materials, is very much 

 greater than the difference between good engineering and any 

 probable improvements upon it. And meantime, we find our hands 

 sufficiently full in trying to keep up to the best existing standards, 

 pending the time when Messieurs the discoverers show us how to get 

 on a little further. 



[A. B. W. K.] 



