CHAP. II.] TUMOURS, INTERNAL AND EXTERNAL. 145 



appear upon the surface, which they treat as if 

 local ; when, alas ! these are seated in the very vitals 

 of the animal, sometimes in the most delicate parts 

 of the mesentery itself. Heating, or cordial me- 

 dicines, as well as those other untoward mixtures, 

 which corrode, or blunt, the mouths of the finer 

 lacteals, thereby dispose them to receive materials 

 improper for the making of good blood ; the con- 

 sequence whereof is, that tubercles frequently are 

 found, which fill up the cavities of the lacteal duct. 

 The matter of these tubercles is usually indurated, 

 and resembles the yolk of a hard-boiled egg. The 

 disease appears in a staring coat, is commonly con- 

 sidered to be the worms, and treated as such, with 

 more heating or drastic medicines, which but in- 

 crease the evil. Other obstructions are thereby 

 formed, and if a solitary worm or two should be 

 found on dissection (as frequently happens), they have 

 been generated in the obstructed part, but have not 

 caused any disorder. 



Of the mesenteric canal, it may be useful, as well 

 as curious, to remark, that we have always found 

 its state of health or disease to correspond with the 

 appearance of the coat: when this is smooth, the 

 former is full and free from obstructions ; when 

 rough, the contrary. In hide-bound, this canal is 

 yellow; in farcy, red, as well as the bowels; these 

 appear blueish, when the horse dies in consequence 

 of being worn out, though, at the same time, the 

 flaccid lacteals still preserve their healthy wkite, 

 if no other cause to the contrary prevails. But, 



H 



