A series of experiments relating to phosphori and the prismatic colours they are found to exhibit in the dark
A scientific treatise by Benjamin Wilson, published in London in 1775 by Dodsley, Becket, Kearsley and the opticians Dollond and Smith, on phosphorescence and the colours phosphori show in the dark. The single picture is an engraved apparatus: a cylindrical drum with a central spindle, internal discs and a detached base with a handle, drawn in fine parallel hatching. A designer might take from it the crosshatched shading that renders curved metal and wood surfaces.
