For, as I hope my Endeavours may
afford them some assistance towards this work, so those Endeavours are much
too Vnfinish'd to give them any discouragement, as if there were little
left for others to do towards the History of Colours.
For (first) I have been willing to leave unmention'd the _most part_ of
those Phaenomena of Colours, that Nature presents us of her own accord,
(that is, without being guided or over-ruld by man) such as the different
Colours that several sorts of Fruites pass through before they are
perfectly ripe, and those that appear upon the fading of flowers and
leaves, and the putrifaction (and its several degrees) of fruits, &c.
together with a thousand other obvious Instances of the changes of colours.
Nor have I _much_ medled with those familiar Phaenomena wherein man is not
an Idle spectator; such as the Greenness produc'd by salt in Beef much
powder'd, and the Redness produc'd in the shells of Lobsters upon the
boyling of those fishes; For I was willing to leave the _gathering_ of
_Observations_ to those that have not the Opportunity to _make
Experiments_. And for the same Reasons, among others, I did purposly omit
the Lucriferous practise of Trades-men about colours; as the ways of
making Pigments, of Bleanching wax, of dying Scarlet, &c.
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