C 1 2 7 3 
Scholium. 
I doubt nor, but that thofe who are ufed to ac- 
count for the Colours of all confident Bodies, from 
the Reflexion of thofe Colours from their Sur- 
faces, which is the common Way of accounting for 
the Colours of folid Subftances, without noticing the 
Colours of pellucid Bodies; and are ufed to derive 
the different Colours of the Skin from differently 
coloured Fluids, appearing thro’ its pellucid VefTels, 
as in mod morbid Cafes; may not be intirely fatif- 
fied, at firfl, with this Account of the different Co- 
lours of human Bodies being occafioned, as I have 
affirmed, by the more or lefs perfed Tranfmifllon of 
the Rays of Light thro’ their Cuticles ; which, from 
the different Thicknefs and Denfity it is obferved to 
be of, is more or lefs fit to tranfmit thofe Rays ; 
the more of which being intercepted, the darker 
the Skin appears; till, at lad, being intirely inter- 
cepted by the thickcd and denfed Skins, as thole 
of Negroes are, it appears, of no Colour, or looks 
black. But let fuch confider, that if the Whitenefs 
of the Skin, in Whites, proceeds from theThinnefs 
of its Subdance, Rarenefs of its Texture, the Num- 
bers of its Pores, and Minutenefs of its Particles, by 
which Strudure it tranfmits the Rays of Light ; as 
is very probable, from this and the 1. Propofition : 
If fo, I fay, there will be no Reafon to fuppofe, but 
that the Colours of Mulatto's , Indians , and Negroes, 
proceed from a fimilar or like Caufe, and not from 
any particular new-induced Texture, by which their 
Skins may become lefs able, or intirely incapable, 
to refled the Rays of Light ; fince their Colours feem 
R to 
