Drawing, Etching, and Experiment in Christopher Wren’s Figure of the Brain

Abstract:

Christopher Wren’s figure of the brain ‘viewed from below’ in Thomas Willis’s Cerebri anatome (1664) set a precedent, not only for subsequent images of the brain, but for scientific illustration. The image is the visual proof of a Baconian experiment conducted by the Oxford dissection team, in which dye was pumped into the carotid arteries of animal and human specimens in order to imitate the natural flow of blood, thereby applying William Harvey’s theory of circulation to the brain. Usually described as engravings, Wren’s images are in fact etchings (produced by the acid process), significant because etching for book illustration was then in its infancy in England. In addition to considering Wren as an experimental etcher, this article frames our understanding of Wren’s contributions to Willis’s project in terms of his virtuosic talents as amateur draughtsman, natural historian, anatomist, and his use of optical and draughting instruments.