Early References to Fluorescence and Light transmitted by Thin Gold Films

PETRO VAN MUSSCHENBROEK, in his “Elementa Physicæ,” after a discussion of the colours of thin films, proceeds:—“id quoque conspicuum est in infuso Ligni Nephritic, quod pro diverso tam oculi, quam lucis situ, alio colore apparet” (p. 393, second edition, Leyden, 1741).