vs. 



-. r 



s^.. 



V . — , 



15* "• 





^^ 





'-i .- ^>^ 



J 1/ 



Tf- 



Figure 43. — A Study Sketch for a compensating lever 

 locomotive probably prepared by Coleman Sellers about 

 1855. Note "Xiles" marked on the valve box. From the 

 Peale-Sellers papers. {Courtesy American Philosophical Society.) 



103 



