Descripçaó e uso De Dynamomêtro, Para contreur e comparar a forca relativa dos homens a dos cavallos e de todas as bêstas de tiro: para julgar a resistencia das maguinas... This instrument was used for measuring and comparing the relative strength of men, horses, and other beasts of burden. Also included are descriptions of other instruments, and engraved plate illustrations.

These are copies in an unknown hand [the name "Meriel Nevill Watt" appears in the front of the volume] of letters, primarily from Ellis, that were published in the "Philosophical Transactions" of the Royal Society in London. Most relate to botanical topics, and many are written to Peter Collinson. A few are written by Peter Woulfe. Included are contemporary engravings from the "Transactions," as well as original wash drawings copied from the engravings.

An evolutionist before Darwin, an embryologist, paleontologist, and comparative anatomist, Étienne Geoffroy Saint Hilaire was a Professor of Vertebrate Zoology at the Musée National d'Histoire Naturelle in Paris for the half century following the Reign of Terror. Following in the footsteps of Lamarck, Geoffroy held tenaciously to a belief in the underlying unity of organismal design, to the great change of being, and the possibility of the transmutation of species in time, amassing evidence for his claims through research in comparative anatomy, paleontology, and embryology. The Geoffroy Collection is comprised of 0.75 linear feet of lecture notes and correspondence relating to Geoffroy's diverse interests in natural history, Egypt, comparative anatomy, analogies, paleontology, and embryology, and it is particularly rich for his studies of teratology. All items are in French.