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be carried into the veflels of tlic gall bladder, and there fix them- 

 felves ; forafmuch as thefe vellels are lined with a (limy and te- 

 nacious fubllance, and alfo bccaufe the gall is not like the blood, 

 in continual circulation, but is retained in its vefTels, or emitted, as 

 the calls of the animal oeconomy require. Again, they are found 

 fwarming in the liver, where they produce tumours and callofities, 

 and caufe the colour of it to chan2:e. And it ieems to me not at all 

 furprizing that thefe animalcules Ihould live and be nouriflied in the 

 juices of the gall, for every living creature has a fituation and I'pecfes 

 of food peculiar to itfelf. Sea-fiih die in frefli, and river-fifli in fait 

 water. A worm cannot live in the air, and a fowl expires in the 

 earth. What wonder is it then that the creature of whicli we are 

 treating, when introduced into the body of another animal, Ihould 

 find its peculiar place of life, growth, and increafe, in the vefTels of 

 the gall, and in the gall itfelf ? 



In the laft place, hke as we experience, that many living crea- 

 tures arc found in the human body, producing difeafe, pain, and 

 death itfelf ; fo it is my opinion, that the animalcules of which I have 

 been treating, and which arc fometimes found together by thou- 

 fands, may produce the following mifchievous confequences : 



Firft, the extraordinary diftenfionof the parts where they harbour, 

 as well by the growth and increafe of their own bodies, as by the 

 multiplication of their fpecies or brood. 



Secondly, by their biting or gnawing the parts they infcft, lo as at 

 length to break or deftroy their texture ; and thus wholly, or in 

 part, render them incapable of performing their funftions. 



Thirdly, by forcing their bodies into the fmall tubes, and veflels, 

 whereby the delicate frame of thofe tender parts is torn afundcr. 



Fourthly, by obftru6ling the paflages in the veflels, whereby the 

 circulation of the juices is prevented, and an inflammation enfues. 



Fifthly, by devouring and confuming the nutritive juices, whereby 



