COHAUSEN, Johann Henrich (1665-1750). Lumen Novum Phosphoris Accensum sive Exercitatio Physico-Chymica. Amsterdam: Johannes Oosterwijk, 1717. 8vo. Engraved allegorical frontispiece representing the mystical properties of phosphorus, title in red and black, printed side notes, decorated initials, printer’s woodcut device on title page, 5 engraved plates (hole in frontispiece with corresponding stain, occasional light spotting and staining). Contemporary calf with crowned coat-of-arms embossed on covers and gilt corner pieces, gilt title to spine in compartments, marbled endpapers and pastedowns, red edges (rubbed). Provenance: Henri-François d'Aguesseau (1668-1751), chancellor of France from 1717 (coat of arms on the covers); early shelf mark to verso of front free endpaper. FIRST EDITION of this work on chemical philosophy, including an address to the reader and concerning all the theories on the phenomena of phosphorescence: natural phosphors of the air, sea and land; luminescence of plants and animals, such as in glow-worms, as well as artificial phosphors (Bononian stone); with a mention of the “hermetic phosphorus” discovered in 1673 by Christian Adolph Balduin. Cohausen served as physician to the prince-bishop of Munster from 1700 and wrote medical satirical works. Caillet 2426; Duveen p.139; Ferguson, I, 168.