First page of handwritten lecture notes with diagrams prepared by Louis Pasteur for a lecture to the National Academy of Medicine on the subject of crystal structures, tartaric acid, and arsenites. This work led to the field of stereochemistry.
Pasteur, Louis. “Louis Pasteur Lecture Notes on Crystal Structure, Tartaric Acid, and Arsenites (1 of 4).” Louis Pasteur Lecture Notes on Crystal Structure, Tartaric Acid, and Arsenites, n.d. Fisher-Pasteur Memorial Collection, Box 1, Folder 1. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/d791sg21k.