20-1 ERUPTIONS. 



without any disturbance in the general health of the animal. 

 For the want of plainer terms, I shall denominate these 

 different eruptions by the names of Hry or Scurfy, and Papular 

 or Blotchy eruptions. 



The Scuefx Eeuption is characterised by the very in- 

 sidious manner in which it appears. It is usually present upon 

 the skin about the hind quarters, the neck, and occasionally 

 upon the shoulders. The eruption consists of innumerable 

 small and somewhat hard elevations ; and if the hair which 

 immediately covers them be turned aside, so as to fuUy expose 

 them to the bottom, they will present to view a dirty grey- 

 coloured appearance, while, if one or two are loosened from 

 their matrix and opened, the whole will appear to consist 

 of a chalk-like substance. It is seldom, as I have before 

 observed, that this form of eruption is attended with any 

 constitutional disturbance ; some horses, in fact, are never free 

 from an eruption of this character, the cause of which, in 

 numerous instances, we may affirm, is dependent upon a morbid 

 influence resident within the mucous tissues of the stomach 

 and bowels. 



The Papulae Eeuption usually makes its appearance 

 upon the skin very suddenly. It exhibits itself for the most 

 part during the summer season, particularly if the animal be 

 exposed when the temperature of the weather is very high, or 

 when it is subject to rapid and extreme changes ; whereas the 

 scurfy variety is common to all periods of the year. The 

 attack, as I have just observed, is sudden. A groom may leave 

 his horse, as it were, now, and upon returning to his charge in 

 an hour hence, may find him covered from head to foot with 

 large blotchy elevations. 



The appearance of the eruption is peculiar : it consists in 

 some instances of round flat blotches, varying in size from a 



