OPERATING TABLES. 183 



by-pass valve is provided so that when water is not being deliv- 

 ered to the .cylinder, and the pump still running, it passes back 

 into the supply tank. 



Figure 196 shows the table in an horizontal position, with 

 horse secured to table ready for operation.- The middle section 

 of the lower half of the table may be easily removed, permitting 

 the operator to stand between the legs of the animal. 



Figure 197 shows the table in the vertical position, with a 

 horse secured to it after the operation, prior to being released. 

 The center section previously referred tq is shown removed. 



As the head and tail extensions are removable and inter- 

 changeable, the animal may be placed upon the table facing 

 either way. 



The manipulation of the operating table may readily be 

 accomplished by the surgeon and a reasonably competent assist- 

 ant. 



Figure 198 represents the table in upright position — front 

 view. To place an animal on this table the head is supplied 

 with a strong halter to which is attached a 15 or 20-foot rein 

 (rope). This rein is passed through the eye in the head piece 

 of the table (F). The groom handling the rein can step entirely 

 beyond reach of the animal and yet hold the head firmly fixed 

 against the table. The fixation may be increased by carrying the 

 halter rope back along the side of the patient and passing it 

 through the table at "E," instead of the side strap for which 

 this opening is made; by traction on this rope the animal's 

 body is pressed firmly against the table. The horse is now in 

 position where the operator can affix a l^obble strap or rope to 

 off fore pastern. This is passed through the opening "H," 

 and tied by an assistant to prevent the animal from rearing. 

 The body girths can now be applied without danger to the 

 operator. 



The table with the patient upon it can now be promptly 

 brought to the horizontal position by means of the hydraulic 

 pump, with the operator and assistants" entirely out of reach 

 of the animal in its struggles ; and once down the restraint can 

 be completed without coming in striking reach of the horse. 



Figure 199 represents the table in upright position, front 



