_Annotation II._
So that as by the present (XLVIII.) Experiment it appears, that divers
Minerals will impart to fusible Masses, Colours differing from their own;
so by the making and compounding of Amels, it may appear, that divers
Bodies will both retain their Colour in the fire, and impart the _same_ to
some others wherewith they were vitrifi'd, and in such Tryals as that
mention'd in the 17. Experiment, where I told you, that ev'n in Amels a
Blew and Yellow will compound a Green. 'Tis pretty to behold, not only that
some Colours are of so fix'd a Nature, as to be capable of mixture without
receiving any detriment by the fire, that do's so easily destroy or spoyl
those of other Bodies; but Mineral Pigments may be mingled by fire little
less regularly and successfully, than in ordinary Dyeing Fatts, the vulgar
Colours are wont to be mingled by the help of Water.
_Annotation III._
'Tis not only Metalline, but other Mineral Bodies, that may be imploy'd, to
give Tinctures unto Glass (and 'tis worth noting how small a quantity of
some Mineral substances, will Tinge a Comparatively vast proportion of
Glass, and we have sometimes attempted to Colour Glass, ev'n with Pretious
Stones, and had cause to think the Experiment not cast away.
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