VI 



HIGH-PRESSURE COMPOUND LOCOMOTIVES 



THE coming of the L.N.E.R. high- 

 pressure compound 4-6-4 marked the 

 greatest departure from current practice 

 ever seen on a British railway. It is quite 

 evident, in the new engine, that Mr. Gresley 

 is well satisfied with his present design of 

 what we call chassis. 



He carried it forward nto the newi model, 

 and this is the first great point for notice. 

 Should "No. 10,000 " (we hope the designer 

 will give it a name ere long) prove successful 

 in all major respects, it will not be difficult 

 to rebuild the present " Pacifies " to con- 

 form to it. It is mainly a question of a 

 new boiler. 



The boiler is the greatest departure from 

 anything seen in Britain, and Mr. Gresley 

 was not afraid to take a step about which 



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