selenitis

Updated: May 24, 2025

But for further Satisfaction, not having the Opportunity to Foliate those Plates, and so turn them into Looking-glasses, we Foliated a Plate of Muscovy Glass, and then laying on it a little Transparent Varnish of a Gold Colour, we expos'd it to the Sun-beams, so as to cast them upon a Body fit to receive them, on which the Reflected Light, appearing, as we expected, Yellow, manifested that Rebounding from the Specular part of the Selenitis, it was Ting'd in its return with the Colour of the Transparent Varnish through which it pass'd.

Robert Boyle - Experiments and Considerations Touching Colours (1664)