Traité des caracteres extérieurs des fossiles
A French translation of Abraham Gottlob Werner's 1795 treatise on the external characters of fossils and minerals, printed at Dresden by the Walther brothers for mineralogists and naturalists. The page is a tabular key: a printed table of headings and rows of terms, with columns for how a mineral is discovered, its external characters, and its varieties. A designer might take its dense, ruled grid of small serif type and its rows of hand-aligned brackets as a model for a structured reference layout.
