338 SEROUS CYSTS. 



the same spot, as a result of pressure against the side of the withers, 

 especially on the off-side from a side-saddle (p. 101). 



TREATMENT.— The best method of treating this affection is to 

 draw off the serum with an aspirator under antiseptic precautions 

 (p. 70), which is an operation that requires surgical knowledge and 

 skill. If we cannot do this, we may make an opening through the 

 skin at the lowest point of the tumour with a rowelling scissors 

 (Fig. 139), and give exit to the fluid with a probe. We should then 



Fig. 139. — Rowelling scissors. 



syringe into the cavity an antiseptic solution (p. 67), and having 

 again emptied it, w^e may repeat the operation. After having 

 withdrawn the syringe, we should cover over the wound with 

 tannoform or iodoform and antiseptic cotton wool. The syringe 

 and probe, before being used, should be placed for about five 

 minutes in boiling water, and after that, in a solution of creolin 

 or carbolic acid (1 to 20 of water), so as to render these in- 

 struments free from organisms which might give rise to sup- 

 puration. 



