Figure 39. — Main steam engine at the U.S. Mint, Phila- 

 delphia. Probably built in 1829-1830 bv Rush and Muhlen- 

 berg. The text accompanying the illustration stated: "There 

 is a most beautiful steam engine . . . called a steeple engine." 

 The engine had two cylinders. From Gleason'i Pictorial Draw- 

 ing Room Companion (July 17. 1852), vol. 3. 



75 



