Descriptions of the inferior maxillary bones of mastodons : in the cabinet of the American Philosophical Society : with remarks on the genus Tetracaulodon, etc.
This is a Philadelphia atlas of 1833 by Isaac Hays, printed for the American Philosophical Society, with plates of fossil mastodon lower jaws and teeth drawn in pencil-like line shading on cream paper. The plates show side and top views of jawbones with molars in profile, so a designer could borrow the sparse hatching and clean outline style for scientific or archival diagrams.
