2 12 Hoi'ses on Board Ship. 



enclosed in an unyielding box of horn. In 

 laminitis caused by premature work after a 

 long period of idleness, we have a case some- 

 what akin to frost-bite, which is produced by 

 the coldness of the air causing the blood to 

 leave the blood vessels of the part, the result 

 being that the longer the blood is absent, the 

 more irritating will be its effect on the blood 

 vessels when it returns ; and also the degree 

 of irritation will be proportionate to the 

 suddenness of the return. Consequently, if 

 the blood rushes violently back to blood 

 vessels which have remained comparatively 

 empty for a considerable time — as would 

 happen in the event of a frost-bitten person 

 or animal entering a warm room or approach- 

 ing a fire — more or less inflammation will 

 ensue, with the probable- result of mortification 



