492 Johann Heinrich COHAUSEN. Lumen Novum Phosphoris Accensum, sive Exercitatio Physico-Chymica, de causa lucis in Phosphoris tam naturalibus quàm artificialibus, exarata ad provocationem celeberrimae Regiae in Gallis Burdegalensium Academiae à Joanne Henr. Cohausen, M.D. 8° Amstelodami: apud Joannem Oosterwyk 1717 Ferguson Young Nat Union Cat British Library Wisconsin [Illustrations:- 6 engravings inserted into the text. 1. Frontispiece. 138x80mm. Signed "F. Ottens Del: et Fec." In the dark night Mercury, bearing a caduceus and accompanied by a winged fire-breathing dragon, holds a mirror and reflects the light of the sun from over the horizon down upon a globe, around which seven figures stand. Among these is Neptune with trident, Saturn with scythe, Mars, a skeleton, Vulcan bearing fire, a goddess holding aloft a mirror within which is a fiery light, and another goddess holding a flaming heart. 2. Inserted before page 3. 122x75mm. In a forested landscape stands a hen and a rooster. In the foreground are two eggs, one the "Ovum flammeum" with flames, the other the "Ovum cometen" within which a comet and stars are seen. 3. Inserted after page 36. 120x75mm. In a night scene 8 different lights are shown. Two men struggle in a swamp after following the ignus fatuus. 4. Inserted before page 203. 120x75mm. In a dark room 5 examples of phosphoric light are shown. Two men behold a glowing globe with the name "Leopoldus" upon it. On a table is a painting showing a double-headed eagle with sun on its breast. 5. Inserted after page 276. 134x80mm. A strange lamp in the form of a man's head stands on a pedestal. 6. Inserted after page 178. 121x75mm. Emblem copied from part of an illustration to Robert Fludd - the Apollo and Dionysius image, in 'Medicina Catholica' 1629 and 'Philosophia Moysaica' 1638.]