CHEEK-PIE CES. 



253 



Plain Ring. 



Ring with 

 Barrel Brace. 



Double or 

 Four Ring. 



Double Ring 

 with Double 

 Mouth-Piece. 



FIG. iiy. 



CHEEK- PIECES. 



Full. 



Full with 

 Barrel Brace. 



, Half. 



