Orang–Outang, sive Homo Sylvestris; or, The Anatomy of a Pygmie
London: Thomas Bennet and Daniel Brown, 1699. First Edition. Full dark red morocco, signed in gilt on the front inner dentelle by Sangorski. Title page foxed and bearing three former owners’ signatures; folding plates with minor tears and small chips to the inner corners where they are commonly pulled when opened; else a near fine copy, with the two pages of advertisements at the end. Among the foundational books of science, and here in a notably attractive copy, a combination not often encountered. PMM 169. Item #343
Tyson’s treatise constitutes the first systematic work of post-Renaissance comparative morphology and the primary empirical ancestor of modern primatology and evolutionary biology. Through detailed dissection and methodical anatomical comparison of a specimen he termed a “pygmie”—now understood to have been a juvenile chimpanzee (Pan troglodytes)—Tyson catalogued forty-eight structural features in which the animal more closely resembled Homo sapiens than any known monkey, and thirty-four in which it more closely resembled the monkeys than humans. This quantitative, feature-by-feature analysis of homologous anatomy was without precedent, transforming what had largely been anecdotal speculation about human–ape resemblance into a rigorously documented anatomical argument.
By formally positioning the anthropoid ape as intermediate between the cercopithecid monkeys and humans, Tyson destabilized the rigid Scala Naturae that had treated human beings as categorically separate from other animals. His demonstration of extensive shared osteological, muscular, and visceral structures posed a direct, if still implicit, challenge to prevailing doctrines of human exceptionalism grounded in theology and Aristotelian hierarchy. Although Tyson himself did not articulate an evolutionary mechanism, his careful description of graded anatomical continuity provided essential empirical support for later naturalists who did, from Buffon’s comparative natural history and Cuvier’s comparative anatomy to the emerging developmental and embryological perspectives of the nineteenth century.
The morphological framework established in "Orang–Outang" became a crucial point of reference in the nineteenth-century debates on human origins. Darwin drew upon Tyson’s demonstration of close structural affinities between humans and African apes in "The Descent of Man" (1871), integrating those observations into an explicitly evolutionary account of human ancestry. Thomas Henry Huxley likewise mobilized Tyson’s dissections in "Man’s Place in Nature" (1863), where he situated humans and great apes within a single natural lineage, thereby breaking decisively with earlier attempts to isolate humanity outside the animal kingdom. Subsequent advances in comparative anatomy, paleontology, and, much later, molecular phylogenetics would repeatedly confirm the pattern of affinity that Tyson first documented. That Tyson’s own conclusions remained within a pre-evolutionary framework does not diminish the work’s significance: the anatomical architecture upon which later hypotheses of common descent were constructed was already present in his pages, awaiting the theoretical synthesis that Darwin and his successors would supply.
Price: $22,000.00