162 ADVANCEMEU L OF 1 LEAIlXlNG. [BOOK tV. 



of being altered by them, but must be affected, accommo 

 dated, or palliated by a regimen, and familiar medicines. 



Again, comparative anatomy requires accurate observations 

 upon all the humours, and the marks and impressions of 

 diseases in different bodies upon dissection ; for the humours 

 are commonly passed over in anatomy, as loathsome and ex- 

 crementitious things; whereas it is highly useful and necessary 

 to note their nature and the various kinds that may some 

 times be found in the human body, in what cavities they 

 principally lodge, and with what advantage, disadvantage, and 

 the like. So the marks and impressions of diseases, and the 

 changes and devastations they bring upon the internal parts, 

 are to be diligently observed in different dissections ; viz. 

 imposthumes, ulcerations, solutions of continuity, putrefac 

 tions, corrosions, consumptions, contractions, extensions, con 

 vulsions, luxations, dislocations, obstructions, repletions, 

 tumours ; and preternatural excrescences, as stones, car- 

 nosities, wens, worms, &c., all which should be very carefully 

 examined, and orderly digested in the comparative anatomy 

 we ypeak of ; and the experiments of several physicians be 

 here collected and compared together. But this variety of 

 accidents, is by anatomists either slightly touched or else 

 passed over in silence. 



That defect in anatomy, owing to its not having been 

 practised upon live bodies, needs not be spoken to, the thing 

 itself being odious, cruel, and justly condemned by Celsus ; 

 yet the observation of the ancients is true, that many subtile 

 pores, passages, and perforations appeal not upon dissection, 

 because they are closed and concealed in dead bodies, that 

 might be open and manifest in live ones. Wherefore, if we 

 would consult the good of mankind, without being guilty of 

 cruelty, this anatomy of live creatures should be entirely 

 deserted or left to the casual inspection of chimrgeons, or 

 may be sufficiently performed upon living brutes, notwith 

 standing the dissimilitude between their parts and those of 

 men, so as to answer the design, provided it be done with 

 judgment. 



Physicians, likewise, when they inquire into diseases, find 

 to many which they judge incurable, either from their first 



1 Ds Re Medioa, i. 5 



