OF ACCIDENTAL PRODUCTIONS. 519 



CHAPTER XI. 



OF ACCIDENTAL PRODUCTIONS. 



818. The productions which occur accidentally in the hu- 

 man organization are humours, concretions, tissues, and living 

 animals. 



These objects do not form a part of the healthy or regular 

 organization: they belong only to morbid anatomy. Their 

 description, or at least their summary indication, here has for 

 its object to complete what has been said, under the head of 

 each tissue in particular, upon the alterations and productions 

 which are peculiar to it. The productions which are under 

 consideration in this chapter, are common to several parts or 

 to the tofality of the organization. 



The knowledge of the accidental productions and alterations 

 is very important to 'the pathological anatomist; for, on the 

 one hand, this knowledge is the basis of pathology; and on 

 the other hand, anatomy being rarely studied upon healthy 

 subjects, but generally upon the bodies of diseased individu- 

 als, the anatomist meets at every instant', in his researches, 

 with alterations of organization and accidental productions. 



SECTION I. 



OF ACCIDENTAL HUMOURS. 



819. The natural humours may be altered in their quan- 

 tity or quality; soTne of these alterations have been indicated. 

 We sometimes find besides humours altogether different from 

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