Tracing, base of brain of Ethiopian male by J Wagner Deleted plate 32 showing an anatomical study of the base of the brain of an Ethiopian male. Inscribed with publication and plate details. Signed in graphite bottom right 'J Wagner del.' Tacing on sketching paper applied to the following plate, to enable keying of brain areas. The engraver used the key on this tracing to add to the final plate. Subject: Eugenics / Anatomy Published in Philosophical Transactions as part of paper titled 'On the brain of the negro [sic], compared with that of the European and the orang-outang' by Friedrich Tiedemann. Received and read to the Royal Society on 9 June 1836. [1836]