PARONYCHIA ovnjM. 325 



Louping 111. — Tahes Dorsalis — Phrenitis. In every- 

 day language this is properly called inflammation of the 

 brain. Youatt, in his work on sheep, has been at the 

 trouble to write out no less than six different diseases, all 

 of which might have been treated under this head, being 

 essentially the same in character, cause, and effect. It 

 is characterized by extreme dullness, followed by ex- 

 citement and madness. In horses, these symptoms continue 

 for about two days ; but in cattle and sheep, much longer. 

 The seat of the disease is the pia mater, or the vascular 

 internal membrane of the brain, which is found after death 

 to be rough and yellow, with extravased lymph and serum 

 at the base of the brain. 



Treatment. Give croton oil, six drops ; syrup of ginger, 

 one tablespoonful ; in a little gruel, so thin that it will run 

 from the tea-pot. Apply cold water or ice to the head, 

 and see that the poor animal does not hurt itself against 

 the wall or fence. 



The causes of this disease are sometimes the result of 

 injury to the head. It also arises from other than external 

 injuria, the principal of which are exposure to cold, and 

 a powerful sun in an exposed situation. But the most 

 common causes are the eating from the pasture poisoning 

 plant, or weeds, as the atropa belladonna, (deadly night- 

 shade,) conium maculatum, (common hemlock,) cicuta 

 virosa, (water hemlock,) delphinium staphysagria, (staves- 

 acre,) felis foeomina, (female fern,) — all of which, if taken 

 in sufficient quantity, will produce disease in the brain. 

 I could easily swell the list of poisonous plants, but it is 

 not my intention to include in this work information of so 

 unimportant a character. 



Paronychia Ovium. — Foot-rot. This disease has 



