Thus you see, _Pyrophilus_, that though to some I may have seem'd to have
lighted on this (50th.) Experiment by chance, and though others may
imagine, that to have excogitated it, must have proceeded from some
extraordinary insight into the nature of Colours, yet indeed, the devising
of it need not be look'd upon as any great matter, especially to one that
is a little vers'd in the notions, I have in these, and other Papers hinted
concerning the differences of Salts. And perhaps I might add upon more than
conjecture, that these very notions and some particulars scatteringly
deliver'd in this Treatise, being skilfully put together, may suggest
divers matters (at least,) about Colours, that will not be altogether
Despicable. But those hinted, _Pyrophilus_, I must now leave such as You to
prosecute, having already spent farr more time than I intended to allow my
self in acquainting You with particular Experiments and Observations
concerning the changes of Colour, to which I might have added many more,
but that I hope I may have presented You with a competent number to make
out in some measure what I have at the beginning of this Essay either
propos'd as my Design in this Tract, or deliver'd as my Conjectures
concerning these matters.
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