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• 
V. Account of an extraordinary EjfeB of the 
Cholick : communicated to the Royal Society, 
. hy that curious Anatomifl Mr, St. Andre, and 
^read March 21. 1717. 
T H E Peri/fall ick Motion of the Tnteftins is by all 
Anatomifts fuppos’d the proper Motion of thofe 
Cylindrical Tubes. 
The ufe of this Motion is to propel the Chyle into 
the vafa la^ea, and to accelerate the grofler Parts of the 
Aliment downwards, in order to expel them, when all 
their nutritive Contents arc extraded. 
This Motion thus eflablilli’d, it naturally (eems to 
' follow that an Inverfion of it (call’d for that Realbn an 
JfitiperiAaltick Motion) fliou’d force the Aliments, Bile, 
pnncreatick jmee, and laftly the F-£ces to alcend cowards 
the Mouth. 
The Caufe of this imaginary Antivermkular Motion, 
•is affigned to a Stoppage of the Inteftin, or to a great 
length of it being ingaged in the fame manner as the 
Fingers of a Glove are choak’d by inverting the 
Glove in drawing it off : Or like as a Silk-Stocking, which 
when ’tis not gartered, falls upon the Foot, and is in 
a manner ffrangled, fo that Tome Force is required to 
bring it up again. 
This fuppos’d, the Antiperifialtick H'jpcthejis ieems 
at firft Sight very natural, and anfwers moft Difficulties. 
For if the P'ermicuUr Motion accelerates the Contents 
of the Inteffins downwards ; the Antwermiedhr, by the 
Law of Contraries, Ihould force them upwards cowards 
.the Mouth. 
Was 
