310 DISTINCTIONS BETWEEN THE [BOOK II. 



shapes. So does " a cold" produce fever in some 

 animals sooner than in others, according as the cir- 

 culation may be more languid, grosser in its parti- 

 cles, more predisposed to inflammation, or other- 

 wise unfitted for its purposes ; whilst some again 

 acquire inflammation without any such accident or 

 cold, the fever being lighted up occasionally by 

 warm stabling alone, though the air they breathe 

 may be perfectly innoxious in other respects. 



How it is that those external diseases, enume- 

 rated at the head of this chapter, are generated, we 

 will not here repeat : the reader may consult the 

 principles upon which our opinions are founded in 

 the twenty-ninth section of book the first, page 95 ; 

 to which we will here merely add, that the tumours 

 we perceive or feel on the surface, which are not of 

 a nature to break and discharge their contents — as 

 farcy, grease, glands — are usually, if not always, 

 accompanied by corresponding tumours on some 

 vital organ, as the lungs, liver, heart. But single 

 tumours, containing matter, as the whole tribe of 

 fistula, &c. are designed to counteract and carry 

 off obstructions, and all baleful affections incident 

 to the organs just mentioned, and of all others: 

 an owner ought therefore to deem himself happy, 

 when some inscrutable long illness of the inside 

 terminates in this manner. The appearance of 

 these latter on the surface, may be taken as good 

 assurance that none then exist internally ; nor, in- 

 deed, any other disorder whatever, the natural 

 strength of the animal system enabling it thus to 



