770 



GENITO-URINARY ORGANS. 



Lund's truss, shown in the illustration (Fig. 325), is perhaps the 

 most efficient of those which survive. The essential portion of this 

 is of metal, and is approximately of the shape of the letter "V." 

 The two ends may be separated and drawn together at will by means 

 of a cord. This apparatus is held in contact with the vulva by 



i^'iG. 325. — Lund's truss. j 



means of strings which pass through eyes in the metallic triangle j 



and are secured to a collar placed on the neck or to a girth secured \ 



round the chest. i 



1 



SECTION OF THE SPHINCTER OF THE TEAT. l 



This operation is performed to render easily pervious the ends of \ 



teats which have undergone contraction as a consequence of changes \ 



in the sphincter or from some other cause. | 



The animals are secured, and the teat to be operated on having l 



been grasped between the index finger and thumb of the left hand, ] 



the point of the little cutting instrunjent shown in Fig. 326 is intro- i 



duced into the opening of the teat, and it is then thrust in as far j 



as the shoulder on the cutting edges. i 



DILATATION OF THE ORIFICE OF THE TEAT. 



The results of the above operation not always proving permanent, 

 and cicatricial contraction often following after a few weeks' time, 



