5tCT.XXiX. 4 . RETROGRADE ABSORBENTS, 365 



is not time for that to be returned to the bowels by 

 the courfe of the circulation. 



There is alfo a chronic aqueous diarrhoea, in 

 which the atmofpheric moifture, drank up by the 

 cutaneous and pulmonary lymphatics, is poured 

 into the inteftines, by the retrograde motions of 

 the lacteals. This difeafe is mod fimilar to the 

 aqueous diabetes, and is frequently exchanged for 

 it : a diftinft inflance of this is recorded by Ben- 

 ningerus, Cent. v. Obf. 98. in which an aqueous 

 diarrhoea fucceeded an aqueous diabetes, and de- 

 ftroyed the patient* There is a curious example of 

 this, described by Sympfon fDe Re Medica) " A 

 young man (fays he) was feiz'ed with a fever, upon, 

 which a diarrhoea came on, with great ftupor; and 

 he refufed to drink any thing, though he was parch- 

 ed up with exceflive heat : the better to fupply him 

 with moifture, I directed his feet to be immerfed in 

 cold water ; immediately I obferved a wonderful 

 decreafe of water in the veflel, and then an impe- 

 tuous ftream of a fluid, fcarcely coloured, was dif- 

 charged by ftool, like a cataract. " 



7. There is another kind of diarrhoea, which has 

 been called cseliaca ; in this difeafe the chyle, drank 

 up by the lacleals of the fmall inteftines, is proba- 

 bly poured into the large inteftines, by the retro- 

 grade motions of their lacleals : as in the chylife- 

 rous diabetes, the chyle is poured into the bladder, 

 by the retrograde motions of the urinary branch of 

 abforbents. 



The chyliferous diabetes, like this chyliferous 

 diarrhoea, produces fudden atrophy ; fmce the nou- 

 ri&ment, which ought to fupply the hourly wafte 

 of the body, is expelled by the bladder, or reclum : 

 whilft the aqueous diabetes, and the aqueous diarr- 

 hoea produce exceflive thirft ; becaufe the. moifture, 

 which is obtained from the atmofphere, is not con- 

 veyed to the thoracic receptacle, as it ought to be, 



B b 2 but 



