214 



CHAPTER XI 



spur wheels ; 3, the second motion pinions ; and 4, the second motion spur 

 wheels. A common modification of this train is to make of double width 

 that second motion pinion coacting with two spur wheels, so that the double 



3/ramer 5creeft 



Hot/3//7^ 



Fig. 119 



load may be distributed. When four or more mills- are laid out in one 

 train, two engines are generally used, practice being divided between driving 

 the mills three and one, or two and two. 



In the earlier 9-roller trains the second motion spur wheels were carried 



Fig. 120 



on high pedestals, as indicated in elevation in Fig. 123, stabilit}^ being aided 

 by tying the pedestals together. As fracture of the pedestal was frequent, 

 it is customary at present to arrange the centres of spur wheels and pinions 



