The Pores of the Skin. 175 
ber of Pores In a human Body. He * fup- 
pofes there are one hundred and twenty fuch 
Pores in a Line one tenth of an Inch long 3 
however, to keep within Compafs, he reckons 
only one hundred. An Inch in Length will 
then contain a thoufand in a Row, and a 
Foot twelve thoufand. According to this 
Computation, a Foot fquare mu ft have in 
it an hundred and forty-four millions : and 
fuppofing the Superficies of a middle-fized 
Man to be fourteen Feet fquare, there will 
be in his Skin two thoufand and fixteen mil¬ 
lions of Pores. 
To acquire fome clearer Idea Rill of this 
prodigious Number of Pores by our Con¬ 
ception of Time, let us reckon with F 
Mersennus, that each Flour confiils of 
fixty Minutes, and each Minute of fixty 
Seconds, or fixty Pulfations of an Artery: 
in one Hour there will then be three thou¬ 
fand and fix hundred Pulfes3 in twenty-four 
Hours eighty-fix thoufand and four hun¬ 
dred 3 and in a Year thirty-one millions five 
hundred and thirty-fix thoufand. But there 
are about fixty-four Times as many Pores 
In the Surface of a Man’s Skin, and there-?, 
fore he mufl live fixty-four Years, ere he 
will have a Puliation for every Pore in his 
Skin. • , * '■ 
* Arc. Nat. Tom. Ill, p. 413. 
f Ibid. p. 413. 
N 3 
Dr. 
