Galeni Pergameni ... opera quae ad nos extant omnia / vol. 6- tomus sextus classem septimam habet
A 1549 Basel edition of Galen's collected medical works, edited by Janus Cornarius and printed by Froben, a scholarly text volume for physicians and humanist readers. Its pictures are woodcut printer's devices showing a staff of Mercury with two entwined serpents, a bird perched between them, and two hands clasping the staff among cloud-like scrolls, with a dense black-letter text page beside them; a designer might take the symmetrical emblem layout and the rope-like serpent forms as a model for heraldic marks.
