3*6 STOMACH AND INTESTINES SECT. XXV. 13. 14. 



glands, and of their excretory duels, are at the 

 fame time inverted, and regurgitate their contained 

 bile into the blood veflels, as appears by the yellow 

 colour of the fkin, and of the urine ; and it is 

 probable the pancreatic fecretion may fuffer an in- 

 yerfion at the fame time, though we have yet no 

 raark by which this can be afcertained. 



13. Mr. eat two putrid pigeons out of a 



cold pigeon-pye, and drank about a pint of beer 

 and ale along with them, and immediately rode 

 about five miles. He was then feized with vomit- 

 ing, which was after a few periods fucceeded by 

 purging ; thefe continued alternately for two hours ; 

 and the purging continued by intervals for fix or 

 eight hours longer. During this time he could not 

 force himfelf to drink more than one pint in the 

 whole ; this great 'inability to drink was owing to 

 the naufea, or inverted motions of the flomach, 

 which the voluntary exertion of fwallowing could 

 feldom and with difficulty overcome; yet he dif- 

 charged in the whole at leaft fix quarts ; whence 

 came this quantity of liquid? Firft, the contents of 

 die flomach were emitted, then of 'the duodenum, 

 gall-bladder, and pancreas, by vomiting. After 

 this the contents of the lower bowels, then the 

 chyle, that was in , the lacleal veflels, and in the 

 receptacle of chyle, was regurgitated into the intef- 

 tines by a retrograde motion of thefe veflels. And 

 afterwards the mucus depofited in the cellular mem- 

 brane, and on the furface of all the other mem- 

 branes, feems to have been abforbed ; and with the 

 fluid abforded from the air to have been carried up 

 their lefpe.ctive lymphatic branches by the increafed 

 energy of their natural motions, and down the 

 vifceral lymphatics, or lacleals, by the inverfion of 

 their motions* 



14. It may be difficult to invent experiments to 

 demonstrate the truth of this inverfion of fome 



branches 



