7.  Thirdly, And the better to shew that White Bodies reflect store of Light, in comparson of those that are otherwise Colour’d, I did in the Darkn’d Room, formerly mention’d, hold not far from the Hole, at which the Light was admitted, a Sheet only of White Paper, from whence casting the Sun-beams upon a White Wall, whereunto it was Obverted, it manifestly appear’d both to Me, and to the Person I took for a Witness of the Experiment, that it Reflected a far greater Light, than any of the other Colours formerly mention’d, the Light so thrown upon one Wall notably Enlightning it, and by it a good part of the Room.  And yet further to show you, that White Bodies Reflect the Beams From them, and not Towards themselves, Let me add, that Ordinary Burning-glasses, such as are wont to be employ’d to light Tobacco, will not in a great while Burn, or so much as Discolour a Sheet of White Paper.  Insomuch that even when I was a Boy, and Lov’d to make Tryals with Burning-glasses, I could not but wonder at this Odd Phaenomenon, which set me very Early upon Guessing at the Nature of Whiteness, especially because I took notice, that the Image of the Sun upon a White Paper was not so well Defin’d (the Light seeming too Diffus’d) as upon Black, and because I try’d, that Blacking over the Paper with Ink, not only the Ink would be quickly Dry’d up, but the Paper that I could not Burn before, would be quickly set on Fire.  I have also try’d, that by exposing my Hand with a Thin Black Glove over it to the Warm Sun, it was thereby very quickly and considerably more Heated, than if I took off the Glove, and held my Hand Naked, or put on it another Glove of Thin but White Leather.  And having thus shewn you, Pyrophilus, that White Bodies reflect the most Light of any, let us now proceed, to consider what is further to be taken notice of in them, in order to our present Enquiry.

8.  And Fourthly, whereas among the Dispositions we attributed to White Bodies, we also intimated this, That such Bodies are apt, like Speculums, though but Imperfect ones, to Reflect the Light that falls on them Untroubled or Unstain’d, we shall besides other particulars to be met with in these Papers, offer you this in favour of the Conjecture; That in the Darkned Room several times mention’d in this Treatse, we try’d that the Sun-beams being cast from a Coloured Body upon a neighbouring White Wall, the Determinate Colour of the Body was from the Wall reflected to the Eye; whereas we could in divers cases manifestly Alter the Colour arriving at the Eye, by Substituting at a convenient Distance, a (conveniently) Colour’d (and Glossy) Body instead of the White Wall.  As by throwing the Beams from a Yellow Body upon a Blew, there would be Exhibited a kind of Green, as in the Experiments about Colours is more fully Declar’d.