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to the pillow on each side of the stall. The dental 

 engine is worked by the foot of an assistant. The 

 hand piece of the flexible shaft is held in the right 

 hand and the jaw in the left by the operator, and 

 he then cuts a large elliptical cup with sharp com- 

 missures in the table of the corner teeth, and then 

 smaller cups are drilled in the second teeth, next 

 to the corner incisors on each side of the mouth, 

 and small dots are bored in the two middle teeth 

 or central incisors. It requires only a few mo- 

 ments to cup the teeth if the horse stands. If 

 the corner teeth have a small cup, they will en- 

 large it with a file, or the dental engine. The cor- 

 ners are cupped inside mostly with a rounded 

 head attached to the flexible shaft of the dental 

 engine and a sharp commissure externally, to 

 give a better and more natural appearance. 



After the cupping of the teeth is finished, 

 they are dried and the saliva is kept away from 

 the teeth with a towel or cloth by wrapping it be- 

 hind the teeth and around the jaw. The cups are 

 stained with a pointed stick saturated in a solu- 

 tion of silver nitrate and then dried at once by 

 plunging into the cup the head of a burning 

 match. The burning match blackens the cup at 

 once. When the stain flows over the tooth it is 

 filed off. When a horse becomes 9 or 10 years old, 

 great car^ is taken that the crusta petrosa within 

 the infundibula is not removed, or in other words, 

 great precaution is taken not to remove any more 

 of the enamel off of the table of the teeth than is 

 necessary: they always leave around the cup as 

 much enamel boundary as possible. The staining, 

 shortening, cupping and polishing of the teeth on 

 horses that are 9 or 10 years old can sometimes 

 be performed so cleverly that an expert may fail 

 to discover the alteration. As the horse passes the 



