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* Field in adopting Newton's Theory of Colours, which he vainly attempts to harmonize with the practice of Artists, yet considers Black as it really is, a compound of the three primary Colours, whether opake or transparent, under the influence of moderate light; but he seems not to be aware that the combination of the same primary Colours which produce black, cannot [[strikethrough]] produce [[/strikethrough]] appear white, except under the influence of excessive light reflecting from glossy points or surfaces. There are other Colours in Nature beside the Prismatic range, and white [[strikethrough]] is one [[/strikethrough]] & Black are of them. The prismatic Colours can only be seen on a white ground, thus rendering them or showing them to be transparent: But when thrown[[strikethrough]] d [[/strikethrough]] on a black ground (without glossy points or particles) they have no existence, much less can they produce white upon it.