Practice after Grouping 95 



Other interesting features of locomotive 

 development on this railway, since the date 

 of grouping, are the multiplication of the 

 well set up o-6-os, of the Derby design, 

 many of which have been built at Crewe; 

 all are superheated, and they form a stud 

 of essentially hard-working machines, simple 

 in construction, and economical in upkeep. 



A few of the 4-6-0 " Claughtons ", and 

 a greater number of the inside-cylindered 

 " Prince of Wales ' express class, of the 

 same wheel formula, have come out, but 

 since 1923, engines of purely North-Western 

 design have been pushed into the back- 

 ground by the fact that the two chief 

 mechanical engineers have been Horwich 

 and Derby men respectively. The Caledo- 

 nian's 4-6-05 have been added to and some 

 good tank engines of this railway's standard 

 pattern have been placed in service. 



The outstanding locomotive feature of 

 the post-group development on the L.M.S. 

 has been the rapid increase in the number 

 of three-cylinder 4-4-0 compounds. Excel- 

 lent engines in every respect, but scarcely 



