Blewness that is wont to appear in Common Crystals of Silver, was quite carry’d away.  Then I made those I meant to Deceive, Moisten some part of their Skin with their own Spittle, and slightly Rub the moistned parts with a little of this Prepar’d Silver, Whereupon they Admir’d to see, that a Snow-white Body laid upon the White Skin should presently produce a deep Blackness, as if the stains had been made with Ink, especially considering that this Blackness could not, like that produc’d by ordinary Ink, be readily Wash’d off, but requir’d many Hours, and part of it some dayes to its Obliteration.  And with the same White Calx and a little Fair Water we likewise Stain’d the White Hafts of Knives, with a lasting Black in those parts where the Calx was Plentifully enough laid on, for where it was laid on but very Thinly, the Stain was not quite of so Deep a Colour.

EXPERIMENT XI

The Cause of the Blackness of those many Nations, which by one common Name we are wont to call Negroes, has been long since Disputed of by Learned Men, who possibly had not done amiss, if they had also taken into Consideration, why some whole races of other Animals besides Men, as Foxes and Hares, are Distinguish’d by a Blackness not familiar to the Generality of Animals of the same Species; The General Opinion (to be mention’d a little lower) has been rejected even by some of the Antient Geographers, and among our Moderns Ortelius and divers other Learned Men have Question’d it.  But this is no place to mention what thoughts I have had to and fro about these Matters:  Only as I shall freely Acknowledge, that to me the inquiry seems more Abstruse than it does to many others, and that because consulting with Authors, and with Books of Voyages, and with Travellers, to satisfie my self in matters of Fact, I have met with some things among them, which seem not to agree very well with the Notions of the most Classick Authors concerning these things; for it being my Present Work to deliver rather matters Historical than Theorys, I shall Annex Some few of my Collections, instead of a Solemn Disputation.  It is commonly presum’d that the Heat of the Climate wherein they live, is the reason, why so many Inhabitants of the Scorching Regions of Africa are Black; and there is this familiar Observation to Countenance this Conjecture, That we plainly see that Mowers, Reapers, and other Countrey-people, who spend the most part of the Hot Summer dayes expos’d to the Sun, have the skin of their Hands and Faces, which are the parts immediately Expos’d to the Sun and Air, made of a Darker Colour than before, and consequently tending to Blackness; And Contrarywise we observe that the Danes and some other people that Inhabit Cold Climates, and even the English who feel not so Rigorous a Cold, have usually Whiter faces than the Spaniards, Portugalls and other European Inhabitants of Hotter Climates.  But this Argument I take to be far more Specious than