( 32 ) 



Of their alternate a&ion. 



192. Of the paflage of the blood 

 from the right ventricle to the 

 lungs, by the pulmonary artery. 



1 93* Of its return from the lungs to 

 the left fide of the heart, by the 

 pulmonary vein. 



1 94 Of its exit from the left ventri- 

 cle, and diftribution throughout 

 the whole body, by the aorta 

 and its branches. 



195. Of its return to the right auricle 

 of the heart, by the vena cava. 



196. Experimental proofs of the re- 

 ality of this mode of circulation. 



197. Remarks on the quantity of 

 blood, and the velocity with 

 which it circulates in a healthy 

 ftate. 



198. Of the valves in the veins, their 

 fituation and ufe. 



199. Of the fyftole and diaftole of 

 the arteries. 



Ob- 



