202 OF THE CONSTRUCTION OF CONDENSING ENGINES. [SECT. vi. 



of practice is towards that which is most economically adapted for its object ; arid 

 the proper use of science is to assist in arriving at right conclusions with the least 

 expense in trials : but at the same time that economy of power is considered, I 

 think appropriate forms, good proportions, and excellent workmanship should be 

 attended to in all machinery ; and in many instances it is desirable that they should 

 be beautiful, for a beautiful machine will be so attended to as to produce economy 

 where an inferior one would perish by neglect. 



