394 Dr. Ure’s new experimental researches , &c. 
the convenience of carriage. Might not such an engine be 
executed on a small scale, for many purposes of domestic 
drudgery ? It would unquestionably furnish a beautiful 
illustration in philosophy, to make one small portion of liquid, 
by the agency of fire, imitate the ceaseless circulation and 
restless activity of life. 
