6. Julius Pollux, in his Onomasticon, describing 

 all the parts of the body, and their uses*, among other 

 thrttgs says, in speaking of the arteries, " that they are 

 the passages and canals of the spirits, as the veins are 

 of the blood ;" and in speaking of the heart, he says, 

 u that it hath two cavities, the one of which commu.* 

 nicatcs v, ith the arteries, the other with the veins. 1 ' 

 Apulcius in explaining the doctrine of Plato, speaks 

 likewise of the circulation of the blood, and in a few 

 %vords describes it as clearly as any of the moderns. It 

 is true, he does not expressly mention that the blood 

 flows from the heart through the arteries, but on its 

 leaving the heart, he supposes its course along the 

 Jungs, to spread itself afterwards into all parts of the 

 body. 



7. Nemesius, bishop of Emissa, who may be ac- 

 counted among the ancients, having lived in the fourth 

 century, has a very clear passage to this purpose, 

 wherein he says, <fi that the motion of the pulse owes 

 its origin to the heart; and particularly to the left ven<* 

 tricle of that viscus. The cordiac artery expands and 

 contracts itself with very much force^ but always with 

 great regularity and harmony of motion, In its ex- 

 pansion it draws in the most subtle parts of the blood . 

 from the adjoining veins, and of that blood forms the 

 aliment of the vital spirits ; and in its contraction ex- 

 hales all the fumes brought into it by secret passages 

 from all parts of the body*" 



8. It appears from what we have said, that the cir. 

 dilation of the blood was known to the ancients, 

 thoti.;li they did not expatiate upon it : and what re- 

 duce;- to a very small degree the honour that Hervey 

 can claim in making that discovery, is that Servetus 

 had treated t it very distinctly before him, in the fifth- 

 part of his book De Ghruiianismi Restifutione ; a 

 work so very scarce, that there are but tew who can,. 

 boast of having seen it in print, Mr. Wotton, in hi? 



