68 



A NEW OPERATING CHAIR. 



as not unusually occurs, he has to perform his task 

 in a constrained attitude. The congested capillaries 

 of the face and impeded functions of the body too 

 plainly indicate the cause of these evils. 



The position in which the patient should be 

 placed, appears to be governed by several circum- 

 stances, namely, the height of the operator, the 



height of the patient, the situation of the tooth to 

 be operated on, and the direction of the light. 



The operator who is six feet high will naturally 

 experience immense inconvenience in using the 

 chair suited to the dentist of five feet, and vice versa. 



An equal inconvenience must occur when the 

 subject for operation is very tall or very short, and 

 these difficulties will be by no means lessened when 



