The works of the Honourable Robert Boyle, Esq., epitomiz'd by Richard Boulton ... ; illustrated with copper plates.

EXPERIMENT XLV.

A Preparation of Steel, us'd as a Succeda∣neum of Spaw-Waters, and whose Colour was like that of German Amethist; be∣ing dropp'd into Rhenish-Wine afforded a love∣ly Green, but Water or Spirit of Wine will not receive that Tincture from it. And to satisfie my self that the Effect depended not on any Acidity in the Wine, I impregnated Water with Spirit of Salt, but notwithstand∣ing, it would not receive a green Tincture from the Liquor. And to vary the Experi∣ment, I dropp'd Alkalizate and urinous Salts into the Green Tincture, by which it put on a dirty and a turbid Colour, but if this es∣sense of Steel was drop'd into Water impreg∣nated with Spirit of Salt, a Solution of Salt of Pot-ashes or of Spirit of Sal Armonick

would turn it Yellow, the Vitriolate Salt be∣ing precipitated by them: And Olaus Wormius takes Notice of a rare kind of Turn-sole, which would communicate a red Tincture to Water; and tho' it would to Wine, yet Spirit of Wine would not be at all Ting'd by it, so that Tincture both depends on the peculiar Tex∣tures of the Body that receives and that which gives the Tincture.