The Use of Trochars. 



63 



been adopted of puncturing the stomach to evacuate it, or 

 to introduce into it medicinal agents. The stomach is punc- 

 tured by trochars, such as are represented by Figs. 12 and 12. 

 The first has a cylindrical canula and stilet, the canula being 

 somewhat less than a thu'd of an inch in diameter, and three 

 and a-half inches in length. The one represented by Fig. 13 

 is flattened, and the canula half-an-inch in its greatest width, 

 and four and a-half inches in length. 



PIG. 12. — A TROCHAE. 



FIG. 13. — A TKOCHAR. 



These trochars are used in the following manner: — A 

 spot is chosen midway between the last rib and the lower 

 part of the haunch bone, and about eight or nine inches below 

 the bony knobs of the backbone of the cow ; a small incision 

 is made through the skin with a lancet or bistoury, and 

 then the trochar is puslied with sufficient force and impulse 

 at once to penetrate the walls of the belly and rumen. 



LN^JECTION OF FLUIDS INTO THE KOSE. 



Fluids are sometimes poured into the nose that they may 

 be swallowed ; but usually the internal exhibition of reme- 

 edies by the nose is effected by means of a stomach-pump, 

 with a long flexible tuble. The practice is an objectionable 

 one, but may, under certain circumstances, be absolutely 

 indispensable. 



The introduction of liquids into the nostrils to exert a 



