MOUTH-PIECES. 



251 



Straight Bar. 



Mullen. 



Half Rough. 



Rollers. 



yr Cambridge. 



Melton. 



Full Port. 



^Ot) Jointed. 



O)) Twisted. 



Double. 



Double and 

 Twisted. 



Greenwood. 



Chain. 



FIG. 115. 



MOUTH-PIECES. 



