Mifiellanea Curiofa. 183 



Alphonfus Borellusy after a great deal of fo. 

 lemn pains taken to {hew his Care and Exact- 

 nefs, and to poffefs his Reader of the Truth of 

 his Calculations , cafts up the force of the 

 Heart, and the Mufcular Coat of the Arte« 

 ries, to be together equal to a weight of 

 3, 750 /. and allots them a Refiftance equal to 

 180,000/. to overcome which is 45* to a To 

 make up for a difproportion, by his own con- 

 feffion, incredible to thofe who have not con* 

 fider'd the Matter as he had done, he flings 

 into the Scale the additional Force of Percuffion, 

 which he leaves indefinite , and thinks fiiffici- 

 f ent to force any quiefcent finite Hefiftance whatfo- 

 ever. 



But as this Account and Hypothefis are part of 

 a Pofthumous Work (if a liberty of Conjecture 

 may be allow'd in fo uncertain a Matter,) I fhou'd 

 fufpect, that thefe Papers were left unfinim'd by 

 Borettus ; or at leaft, that in many places the laft 

 Hand was never put to them. For neither in 

 this Place, nor any other of this Work, does 

 he account for any more than the Syftole of the 

 Heart, an4 the refiftance which is made to the 

 progreffive motion of the Blood in the Arteries 

 only. This alone he found to exceed the Pow- 

 er of the Heart fb prodigioufly, that he feems 

 to muffle it ofY his Hands with a general and 

 precarious Solution, as a difficulty that he was 

 defirous to be rid of. For, having alcrib'd this 

 flupendous (as he himfelf calls it) effect to th« 

 Energy of Percufiion, he takes no care to fatisfie 

 his Reader any farther about it, or to refer him, 

 or give him the expectation of Satisfaction any 

 where elfe } although he has an exprefs Treatife 

 on the Force of PercuJJion> which was written 

 N 4 preparar 



