*48 ftETROGRADE Sect. XXIX. 4. 7, 



ouflv abforbed, into the inteflines and bladder. At the very 

 in flan t that the body is eipofed naked to thz cold air, an unu- 

 fual movement is felt in the bowels -, as is experienced by boys 

 going into the cold bath '; this could not occur from an obftruc- 

 tion of the perfpirable matter, fmce there 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 atmos- 

 pheric moifture, drunk up by the cutaneous and pulmonary lym- 

 phatics, is poured into the interlines, by the retrograde motions 

 of the lacteals. This difeafe is mod fimilar to the aqueous di- 

 abetes, and is frequently exchanged for it : a diltinct inftance 

 of this is recorded by Benningerus, Cent. v. Obf. 98. in which 

 an aqueous diarrhoea fucceeded an aqueous diabetes, and deftroy- 

 ed the patient. There is a curious example of this, defcribed by 

 Sympfon (De Re Medica)-— u A young man (fays he) was feiz- 

 ed with a fever, upon which a diarrhoea came on, with great 

 fhipor ; and he refufed to drink any thing, though he was 

 parched up with excemve heat : the better to fupply him 

 with moifture, I directed his feet to be immerfed in cold water ; 

 immediately 1 obferved a wonderful decreafe of water in the vef- 

 fel, and then an impetuous dream of a fluid, fcarcely coloured, 

 was difcharged by {tool, like a cacaract." 



7. There is another kind of diarrhoea, which lias been called 

 cceliaca ; in this difeafe the chyle, drunk up by the lacteals of 

 the fmall interlines, is probably-poured into the large interlines, 

 by the retrograde motions of their lacteals : as in the chyliferous 

 diabetes, the chyle is poured into the bladder, by the retrograde 

 motions of the urinarv branch of abforbents. 



The chyliferous diabetes, like this chyliferous diarrhoea, pro- 

 duces fudden atrophy ; fince the nourishment, which ought to 

 fupply the hourly waile of the body, is expelled by the bladder, 

 or reilum : whilfl the aqueous diabetes, and the aqueous diar- 

 rhoea produce exceffive thirlt ; becaufe the moifture, which is 

 obtained from the atmofphere, is not conveyed to the thoracic 

 receptacle, as it ought to be, but to the bladder, or lower intes- 

 tines •, whence the chyle, blood, and whole fyftem of glands, are 

 robbed of their proportion of humidity. 



8. There is a third fpecies of diabetes, in which the urine is 

 mucilaginous, and appears ropy in pouring it from one vefTel 

 into another •, and will fometimes coagulate over the fire. This 

 difeafe appears by intervals, and ceafes again, and feems to be 

 occafioned by a previous dropfy in fome part of the body. 

 When fuch a collection is reabforbed, it is not always returned 

 into the circulation ; but the fame irritation that ftimulates one 

 lymphatic branch to reabforb the depofited fluid, inverts the 



urinarv 



