though to divers
of them I be not a stranger, and of some I have myself made Tryall.
Next; I did purposely pass by divers Experiments of other Writers that I
had made Tryall of (and that not without registring some of their Events)
unless I could some way or other improve them, because I wanted leasure to
insert them, and had thoughts of prosecuting the work once begun of laying
together those I had examin'd by themselves in case of my not being
prevented by others diligence. So that there remains not a little, among
the things that are already published, to imploy those that have a mind to
exercise themselves in repeating and examining them. And I will not
undertake, that _none_ of the things deliver'd, ev'n in this Treatise,
though never so faithfully set down, may not prove to be thus farr of this
Sort, as to afford the Curious somewhat to add about them. For I remember
that I have somewhere in the Book it self acknowledged, that having written
it by snatches, partly in the Counntrey, and partly at unseasonable times
of the year, when the want of fit Instruments, and of a competent variety
of flowers, salts, Pigments, and other materials made me leave some of the
following Experiments, (especialy those about Emphatical Colours) far more
unfinish'd than they should have been, if it had been as easie for me to
_supply_ what was wanting to compleat them, as to _discern_.
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