C »4I ] 
inveftigate, and account for, many Efrcdts depending 
on, or proceeding from, thefe Caufes ; fothis Account 
of the Srru&ure of the Skins, and Colour of Negroes, 
and other tawny People, if duly and attentively con- 
fidered, will lead us to the Knowledge of many 
intricate ‘Phenomena, ki Nature and Difeafes, either 
unknown, or not fo eafily accountable for before j 
whofe Confequences, as they are of the greatefl: Con- 
cern to us, fo 1 am unwilling to pal's them over in- 
tirely in this Place ; altho’ a particular Difcuffion of 
each would require fo much more Room, as to make 
the Tail of this Difcourfe bigger than the Body. I 
fhall, therefore, only give you the principal Heads of 
what may be rationally deduced from the foregoing 
Propofitions, as fo many Corollaries from them, re- 
ferving the particular Difcuffion of each to another 
Opportunity ; which as I have already framed to 
myfelf, from many convincing Obfervations, which 
I have made here in Virginia , fo I fhall prefent you 
with them, if you find thefe my Reafonings and Ob- 
fervations either agreeable to the Rules of found Phi- 
lofophy, or of public Utility. 
Coroll. I. White Spots on the Skins of Negroes are 
as common, and proceed from the fame Caufes 
with red Spots on white People $ viz. a Diften- 
tion, Dilatation, and confequent Rarity or Pellu- 
cidity, of the Vafcula of the Epidermis : From 
whence, the Phyfical Caufes of the total Whitenefs 
of fome Negroes, at their Birth, may be accounted 
for (d). 
Coroll. 
( a ) Vide Hift. Caridete apud Heliodor. of 'which I have Jeen an_. 
Infiance in Virginia. 
