( l Q ) 
of the Guts , would at laft only irritate their Sides, 
where they are infenfible, becaufe covered with the 
Dura Mater : And if it might be fuppofed, that 
fuch a Stimulus as is in Queftion, to wit, the 
Gaily could have penetrated through thefe Coats in- 
to the Cavity, where the fenfible Extremities of the 
proper Nerves, of the Guts lie expofed to it, yet fuch 
a Filtration through all thefe Coats^ as it could not 
be performed foot), nor in great Quantity, fo it would 
enter at laft, diverted in a great Meafureof itsgrofter, 
faline, oleaginous, and pungent Parts, by the Filtra- 
tion, and thereby lofe the Power of a Stimulus on 
the Infide - r as the Situation of the Parts, and Dif- 
pofition of the Nerves above defcribed, made it an in- 
effectual one on the Outfide, as much as if it had been 
carried quite out of the Body. 
To conclude, if the Gall fpilt on the Outfide of 
the GutSy had been capable of exciting a Contraction 
in any Part of them, fo foon as it came to cover the 
whole Surface, it muft have had the fame EffeCt 
equally every where, and the whole Canal fhould 
have been found contracted to its fmalleft Diameter : 
Whereas it was found every where diftended to a 
great Pitch. ... 
It is therefore plain, that a Stimulus on the outfide 
of the InteJlineSy has not the EffeCt of fuch a Sti- 
mulus on the Infide. It can neither excite them to a 
Contraction v promote their periftaltic Motion j nor 
fupply the DefeCt or Want of fuch a Stimulus on the 
Infide, much lefs occafionfuch an univerfal Detenti- 
on, or account for the Symptoms arifing from it,,, 
which is what I undertook to prove. 
It 
