An examination of phrenology;
An 1837 anti-phrenology treatise by Thomas Sewall, printed by B. Homans in Washington City, aimed at readers weighing the claims of skull-reading science. Its plates are anatomical engravings of the brain and skull, with numbered leader lines marking regions: a top-down view of the cerebral hemispheres, a side section of the cranium with branching vessels, and a base view of the skull interior. A designer might take their precise hatched line work and the clean numbered-callout layout as a model for scientific diagrams.
