and Alkalies, of Precipitating with Oyl of Vitriol out of Aqua-fortis, and Spirit of Vinegar; and of divers Varyings of the Colours, with these Compounded (from [380] to [384].) Another very pretty Experiment, with a Solution of Minium ([384], [385].) That these Experiments Skilfully digested may hint divers matters about Colours ([386].) The Authors Apologetick conclusion, in which is Cursorily hinted the Bow or Scarlet Dye ([387].) The Authors Letter to Sir Robert Moray, concerning his Observations on the Shining Diamond ([391]. &c.) And the Observations themselves.
THE
EXPERIMENTAL HISTORY
OF COLOURS BEGUN.
THE FIRST PART.
CHAP. I.
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have seen you so passionately addicted, Pyrophilus to the delightful Art of Limning and Painting, that I cannot but think my self obliged to acquaint you with some of those things that have occurred to mee concerning the changes of Colours. And I may expect that I shall as well serve the Virtuosi in general, as gratifie you in particular, by furnishing a person, who, I hope, will both improve my Communications, and communicate his Improvements, with such Experiments and Observations as may both invite you to enquire seriously into the Nature of Colours, and assist you in the Investigation of it. This being the principal scope of the following Tract, I should do that which might prevent my own design,
if I should here attempt to deliver you an accurate and particular Theory of Colours; for that were to present you with what I desire to receive from you; and, as farr as in mee lay, to make that study needless, to which I would engage you.