PURPURA HEMORRHAGICA. 75 



and I believe that occasionally a purgative acting nicely on 

 the bowels is of great service ; but I do not recommend 

 purgatives in other than exceptional cases, and it should 

 in all cases be an oleaginous one. Tr. ferri chlor. may be 

 given in the usual dose. If the patient be weak, alcoholic 

 stimulants may be administered ; but ammonia should 

 never be given under any circumstances. As local applica- 

 tions, vinegar, plumbi acetas, etc., may be used ; or hot or 

 cold water to sponge the nostrils with. Local applications 

 at best are of doubtful efficacy, but must be made for 

 obvious reasons. Gentle hand-rubbing is very beneficial ; 

 severe hand-rubbing being highly injurious. Fomentations 

 are sometimes useful to allay pain just for the time being. 

 In some cases it may be necessary to perform tracheotomy ; 

 but the system is so vitiated in the majority of cases of 

 purpura, that as a rule the operation yields temporary 

 relief only, the animal succumbing in the end. 



Scarlatina is a term usually applied to a mild form of 

 purpura. I have failed, so far, to discover the diff'erence, if 

 any, between scarlatina and purpura, although some writers 

 make a distinction. Scarlatina, as affecting man, is invari- 

 ably caused by infection ; while, in the horse, it is not 

 infectious. The Schneiderian membrane and conjunctivae 

 are reddened instead of spotted. Sore throat, etc. ; treat 

 same as purpura. 



CHAPTER ly. 

 LYMPHANGITIS. 



Definition. — An inflammation of the lymphatic glands and 

 vessels. The disease is known by a great variety of names, 

 as ' water farcy,' ' weed,' 'Monday morning disease,' ' shot of 

 grease,' 'big leg,' 'inflammatory oedema,' etc.; the last- 

 mentioned not being by any means a bad name. Lymph- 

 angitis in the horse is usually confined to the extremities, 



