PABASITICAL DISEASES. 19 



The treatment consists in the application of warmth, and a 

 stimulant such as mustard or ammonia and sweet-oil rubbed on 

 the brisket and the spine. The f ollowing dose may be given twice 

 a day, viz : 



Spirits of Nitrous Ether 2 drams. 



Powdered Ginger 1 " 



" Gentian 1 " 



Warm drinks should be given at short intervals. If the animal is 

 purged, the chalk mixture prescribed for diarrhea should be given. 

 If the palsy is not relieved by this treatment, the following may 

 be given : 



Tincture of Nux Vomica 4 drops. 



OB 



Strychnine , >/ 4 grain. 



diffused in a quarter of a pint of linseed gruel, and the dose slightly 

 increased, afterwards repeated. In the case of a valuable animal, 

 this potent medicine should be given with great care, or only by a 

 veterinary surgeon. 



PARASITICAL DISEASES OF THE INTESTINES. 



Parasites which infest animals are divided into two classes, in- 

 ternal parasites called entozoa, and externcJ ones which are called 

 epizoa. Since the natural history of microscopic animals and 

 those which undergo changes only to be discovered by the use of 

 the microscope, has become better known, much in regard to some 

 peculiar diseases of animals, is now understood. Formerly it was 

 believed that spontaneous generation of minute animalcules could 

 occur, and that parasites were " bred " by diseased matter. What 

 was then supposed to be the consequence of certain diseased con- 

 ditions is now known to be the cause of them, and the whole subject 

 of parasitical disease is in course of satisfactory explanation. But 

 as yet there is much to learn, and the investigation of the subject 

 is surrounded with difficulties. The most important of all the in- 

 ternal parasites which injuriously affect the sheep is undoubtedly 

 that known as 



The Liver Fluke, the distoma hepaticwm of Rudolphi, or the 

 fasciola hepatica of Linnaeus, which inhabits the gall bladder and 

 ducts, and penetrates the substance of the liver. Its presence 

 in this organ produces disorder of its functions and a diseased con- 

 dition of the animal known as 



The Rot, or the Liver Hot. This disease has been the most 

 dreaded by the shepherd for centuries past. It has carried off 



