POLL E]'IL OPERATION. 



53 



the trachea tube while the chloroform is dropped on a towel 

 spread over its mouth. After completing any required 

 operation upon the septum, turbinated bones or other parts, 

 hemorrhage may be controlled by packing one or both nasal 

 fossae with single strips of gauze of sufficient size and 

 carefully securing them by sutures to the sides of the 

 trephine wound or otherwise. 



7. POLL EVIL OPERATION. 

 Plate XL 



Instruments. Clipping shears, razor, sharp scalpels, one 

 dozen compression artery forceps, probe-pointed bistoury, 

 probe, Luer's bone forceps, bone gouge, curette, suture and 

 dressing material. 



Technic. Clip the foretop and mane and shave the 

 forehead and the top of the neck back to a distance of 8 or 

 lo cm. or as much farther as may be required to pass beyond 

 and behind the supposed extension of disease, and disinfect 

 the area. Confine the animal in lateral decubitis preferably 

 upon the operating table, place under complete anaesthesia 

 and remove the halter or other headgear. 



With sharp scalpel make a longitudinal incision on the 

 median line of the head and neck beginning at a point 

 presumably posterior to the diseased area and carrying it 

 over the poll down onto the forehead for a distance of 4 or 

 5 cm. below the foretop. Continue this incision through 

 the skin, the subcutem, the adipose tissue, AT, Plate XI, 

 and either through, or passing around alongside the neck 

 ligament, LN, into the diseased area beneath the latter. 

 Dissect the ligamentum nuchse away from the adjoining 

 tissues as far back as diseased, divide it obliquely upward 

 and backward as indicated at AA, and detach anteriorly 

 from the base of the occiput. Be careful to remove every 



