494 ESSAYS AND OBSERVATIONS 



of the blood. 2. Its flower return to the 

 heart; or, 3. A lefs degree of fenfibility 

 or aptitude for motion in the heart it- 

 felf. « 



I. When one has eat or drunk a great 

 deal before fleep, his pulfe will be, not 

 flow, but quick and full 5 becaufe the fti- 

 mulating power of the blood is increafed^ 

 by a large quantity of chyle received in- 

 to it. Much the fame thing may happen 

 from fleeping in too hot an air, or under 

 too great a weight of cloaths : For we 

 know, that heat quickens the circulation 

 of the fluids in all animals. On the o-» 

 ther hand, when one has faded long be- 

 fore fleep, and lies very cool, his pulfe 

 will, in time of it, be unufually flow. 



But, when the blood is neither loaded 

 with new chyle, nor altogether deftitute 

 of it ; neither too much heated by cloaths 

 or the external air, nor too cool through 

 want of proper covering ; its ftimulating 

 quality will neither be augmented nor 

 diminiflied by fleep; but will continue 

 the fame as in a perfon who is awake iii. 



the 



