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the Veftels and Fibres of both the Cuticle and Cor- 
pus reticaiare from the Skin, but leave them both as 
black as ever they feem to have been, altho’ they 
would, no doubt, extrad whatever juices they mighc 
contain 5 as we fee plainly they do, by the large 
Blifters, raifed by fuch Applications, from the ab- 
raded Veftels fpewing out their liquid Contents; in 
which Blifters there are no Tokens of any black 
Humours in Negroes more than in whites, as I have 
often found upon proper Trials; altho' if there was 
any fuch black Humour contained in their fubcuta- 
neous Veftels, there is no Doubt but it would appear, 
in fome meafure, in the Water of their Blifters, as 
well as the yellow Bile does, when diffufed thro’ the 
Blood, and upon the Skin, as I had lately fome Oppor- 
tunities of obferving. 
But it feems to be a total Overthrow of this Opi- 
nion, that the Blacknefs of the Skin in Negroes 
fhouid proceed from the Corpusreticulare , and Lamel- 
la externa Epidermidis , as we have proved, Erop. III. 
For I believe that none, who maintain this Opinion, 
will or can, with any Pretence of Fads, or Shew of 
Reafon, fuppofe, that thefe nervous, fcaly, and dry 
Parts contain any fuch juices, if they contain any at 
all, as it is mod probable they do nor, being the ulti- 
mate Expanfions of nervous FibrilU , at their final 
Terminations; for no other Parts appear black, but 
thefe Two ; whereas did this Blacknefs proceed from 
any coloured juices, the other Parts or Membranes 
of the Skin and Cuticle, which feem more fit to 
receive fuch coloured Juices, would appear black 
like wife. 
From what has been faid, we may fee how well 
their Opinions are grounded, who derive the Caufc. 
of 
