A Trettifi 0/B O D I E S. Chap, i 6. 



eaufes, the heart wili be made to open and fhut ic (elf, as much 

 as is neceflary for admitting and thrufting out, that little and 

 difordcrly coming bloud, which maketh its courie through it, 

 for that little fpace \vherein the man continueth in thac poli- 

 tion. 



7. Now from thcle effefrs wrought in the heart by the moiften- 



circulation j n g o f the fibers, two other effects do proceed : the one is, that 

 & the bloud is pufhed out of every corner of the heart with ao im- 



h at follow th; petijonindle or velocity. The other is, that by this motion the 

 " n fpirits which are in the ventricles of the heart, and in the bloud 



tint is even then heated there, are more and deeper prefled into 

 the fubftance of the heart/o that you fee the heart imbibeth frefli 

 vigour, and is ftrcngthened with new fpirits, whiles it feemeth 

 to reject that which fliould ftrengthcn it. 



Again, tvvo other effects follow this violent ejection of the 

 bloud out of the heart. The one is,that for the prefent the heart 

 is entirely cleaned of all remainders of bloud, none being per- 

 mitted to fall back to annoy it. The other is,that the heart find- 

 ing it felfdry, the fibers do relent prcfently into their naturall 

 portion and exteniion, and the valvula; that open inwards, fall 

 flat to the fides of the ventricles, and confequently new bloud 

 droppeth in. So that in conclufion, we lee the motion of the 

 heart dependeth originally of its fibers irrigated by the bloud, 

 and not from the force of the vapour, as Monfieur des Cartes 

 fuppofcth. 



This motion of the heart driveth the bloud (which is warm- 

 ed and fpiritualized, by being boyled in this furnace ) through 

 due paflages into the arteries, which from them runneth into 

 the veins, and is a main caufc of making and nourishing other 

 parts; as the liver, the lungs,the brains, and whatfocverelfe de- 

 pendeth of thofe veins and arteries through which the bloud 

 goeth. Which being ever frcfhly heated, and receiving the tin- 

 cture of the hearts nature-, by parting through the heart, whcre- 

 foevcr it ftaycth and curdleth, it groweth into a fubftaHce of a 

 nature conformable to the heart, thongh every one of fuch fub- 

 ftances be of exceeding different conditions in thcmfelves , the 

 very grolfcrt excrements not being excluded from fome par- 

 ticipation of that nature. 



But 



