56 



LEAD-BARS 



CH. Ill 



public-coaches, but the objection to the eye is that, 

 on account of its small size, it may get caught 



^ 



/Qv 



=33 W^ 



Fig. 30. 



O) 



sideways on the hook and twist or break it. This 

 cannot happen with the D. 



On the other hand, the D, having much more 

 play, is more noisy. This is a slight objection, and 

 at night it is an advantage, since the coachman can 

 tell by the ' chatter of the bars' whether or not his 

 leaders are working-, since there will be no rattle if 

 they are pulling. The D is, therefore, recommended 

 for both drags and coaches. 



The fixtures of the single-bars 

 have eves set at right angles to the 

 bars ; these eyes hook on the ends 

 of the main-bar, and there are 

 springs which prevent them from 

 becoming- unhooked. These springs 

 are usually made as shown at A in 

 Fig. 31, but a better method, de- 



vised by Brewster & Co., is to have 

 the end lengthened into a loop, 

 which surrounds the stem of the hook as at B, so 

 as to keep the fitting from coming off should it be- 



