52 MOTION OF THE 



opening and shutting of their minute orifices and invisible 

 pores. But the heart not ceasing to act at the same precise 

 moment as the lungs, but surviving them and continuing to 

 pulsate for a time, the left ventricle and arteries go on distri- 

 buting their blood to the body at large and sending it into the 

 veins ; receiving none from the lungs, however, they are soon 

 exhausted, and left, as it were, empty. But even this fact con- 

 firms our views, in no trifling manner, seeing that it can be 

 ascribed to no other than the cause we have just assumed. 



Moreover it appears from this that the more frequently or 

 forcibly the arteries pulsate, the more speedily will the body 

 be exhausted in an hemorrhagy. Hence, also, it happens, that 

 in fainting fits and in states of alarm, when the heart beats 

 more languidly and with less force, hemorrhages are diminished 

 or arrested. 



Still further, it is from this that after death, when the heart 

 has ceased to beat, it is impossible by dividing either the jugular 

 or femora*! veins and arteries, by any effort to force out more 

 than one half of the whole mass of the blood. Neither could 

 the butcher, did he neglect to cut the throat of the ox which 

 he has knocked on the head and stunned, until the heart had 

 ceased beating, ever bleed the carcass effectually. 



Finally, we are now in a condition to suspect wherefore it is 

 that no one has yet said anything to the purpose upon the 

 anastomosis of the veins and arteries, either as to where or how 

 it is effected, or for what purpose. I now enter upon the 

 investigation of the subject. 



CHAPTER X. 



THE FIRST POSITION : OF THE QUANTITY OF BLOOD PASSING FROM 

 THE VEINS TO THE ARTERIES. AND THAT THERE IS A CIR- 

 CUIT OF THE BLOOD, FREED FROM OBJECTIONS, AND PARTHER 

 CONFIRMED BY EXPERIMENT. 



So far our first position is confirmed, whether the thing be 

 referred to calculation or to experiment and dissection, viz., 

 that the blood is incessantly infused into the arteries in larger 

 quantities than it can be supplied by the food; so that the 



