274- T'^^ Wisdom of GOD Part IL 



of a Wave or Flufh, as Des Cartes and others 

 would have it, but by the Coats of the Arteries 



themfelves, which the Experiments 



* Cartes Ep. of a Certain * Lovai?i Phyfician (the 



df Sep. ^' ^'^' fi^'f*^ whereof is Galen i) do, in my 



Opinion, make good againft him. 

 *' Firft, faith he, if you flit the Artery, and 

 " thruft into it a Pipe, fo big as to fill the Cavi- 

 " ty of it, and caft a ftrait Ligature upon that 

 *' Part of the Artery containing the Pipe, and fo 

 " bind it faft to the Pipe ; notwithflanding the 

 " Blood hath free Paffage thro' the Pipe, yet 

 " will not the Artery beat below the Ligature; 

 ^' but do but take off the Ligature, it will com- 

 " mence again to beat immediately." But be- 

 caufe one might be ready to reply to this Expe- 

 riment, that the reafon why v/hen bound it did 

 not beat, was becaufe the Current of the Blood 

 being ftraiten'd by the Pipe, when beneath the 

 Pipe it came to have more liberty, was not fuffi- 

 cient to ftretch the Coat of the Artery, and fo 

 caufe a Pulfe, but when the Ligature was taken 

 off it might flow between the inclos'd Tube and 

 the Coat of the Artery ; therefore he adds ano- 

 ther, which clearly evinces that this could not be 

 the reafon, but that it is fomething flowing down 

 the Coats of the Artery that caufes the Pulfe ; 

 that is, if you fl:raiten the Artery never fo much, 

 provided the Sides of it do not quite meet and 

 ftop all Paffage of the Blood, the. Veffel will 

 notwithfl:anding continue ftill to beat below or 

 beyond the Coardation. So we fee fome Phyfl- 



ciaaS;> 



