HORSE AND DOG MOUTH-GAGS. 



II 



During prolonged operations the gums become severely bruised, even 

 when the transverse bars of the gag are well covered with rubber. To 

 avoid this, Prof. Bayer, of Vienna, makes the grinding surface of the 

 molar teeth themselves the point of support for a gag. This gag is 



Fig. 17. — Joger's mouth-gag for 

 horses. This apparatus can hi 

 dismounted and packed in a very 

 small space. 



Fig. iS. — Woolf s mouth-gfag — new form. 



shown in Fig. 18, which will be seen to closely resemble that used for 

 many years in operations on the mouth in man. 



It consists of an upper and lower portion, each pro^■ided with guides 

 for retaining the instrument in position on the respective rows of molars. 

 The two portions are inclined towards each other at an angle of about 



Fig. 19. — Woolf's mouth-gag — old form. 



15 degrees. The back carries a handle for inserting the gag in place. 

 The surfaces of the two plates being roughened, after the manner of a 

 rasp, assist in holding the instrument firmly when pushed between the 

 upper and lower molars. In use the animal's tongue is grasped with 



