DISEASES OF THE RESPIRATORY ORGANS. 765 



' i 



When effusion is certain, stimulants are called for to support 

 the system, and these sometimes effect a cure. Powdered digitalis 

 has been highly extolled as a sedative which promotes absorption. 

 It may be administered in the following combination : — 



Nitrate of potash (saltpeter). i 2 to 4 dr. 



Powdered digitalis , 1 " 



Nitric ether 1 oz. 



Mix, and administer three times a day to large oxen, in a pint 

 of gruel or linseed tea. 



As soon as the absorbent action, with free evacuation of the 

 kidneys, is established, the following may be given twice a day : — 



Sulphate of iron (copperas) . . 8 dr. 



Alum 8" 



Infusion of quassia i PV 



When the deposition of false 

 membrane on the lining mem- 

 brane of the pleural cavity pre- 

 vents absorption, and the con- 

 stantly increasing accumulation 'immniaiiiiiw *m» j ' 

 of fluid threatens lung collapse, 

 tapping of the chest must be re- PlG 10O1 ._ OrawinB lhe S kjn to On. Side 

 sorted to. This is performed as before puncturing, 

 in the horse. The sixth or sev- 

 enth intercostal space, just behind the point of the elbow, is chosen. 

 A small scalpel is used to pierce the skin, Which is drawn forward 

 so that the external wound will not correspond with the puncture 



into the chest. (Fig. 1001.) 



A small trocar and canula 



./ t (Fig. 1002) is then pushed 



'% n J through the muscle forming 



, 1. 1 If I. J the thoracic Wall, at about 



[( jL jfr-r the center of the lower third, 



h i 



\l J Fie. 1002.— The Trocar and its Outer 



i" / It! 1 Case, the Canula. 



near the anterior margin of 



the rib. As soon as the wall 



__ _„„„ „ ,_, „ , , .. .. . is pierced, the canula 4s 



Pxa. 1008.— Fluid Flowing from tho Chott f , , , . , , 



through tho Canula. P ushed further In - and the 



trocar withdrawn, when the 



fluid flows freely through the canula. (Fig. 1003.) 



