Les sept nuances de l'oeuvre philosophique hermétique, suivies d'un traité sur la perfection des métaux mis sous l'avantitre L.D.D.P.
A French alchemy treatise of about 1785, published in Paris and attributed to Etteilla, with its text on the seven stages of the hermetic work and on the perfection of metals. The pictures are small black-and-white engravings and woodcut ornaments in the old printed style, including a winged figure blowing a horn, a scrolled cartouche, a numbered plate of alchemical emblems, and a shield with a motto. A designer could draw on their compact emblematic vocabulary, with its scrolls, tight borders and symbolic objects arranged in numbered fields.
