SCIENCE - BRONGNIART Alexandre (1770 - 1847) - Autograph letter signed Autograph letter signed, dated “Sèvres jeudi 17 janv. 39” by the French chemist, mineralogist, geologist and zoologist who collaborated with Georges Cuvier on a study of the geology of the region around Paris. Observing fossil content as well as lithology in sequences, he classified Tertiary formations and was responsible for defining 19th century geological studies as a subject of science by assembling observations and classification. Addressed to the geologist and malacologist Jacques Louis Marin Defrance (1758 - 1850), concerning an upcoming meeting with him: “…Je n’ai pu realiser mon projèt à qui devait en resulter (…) de vous engager à venir diner avec nous et M. de Reissy…”. 1 p. In-8. - This item is under temporary import. If the item is delivered within the United Kingdom, it will be subject to a 5% Value Added Tax (VAT) on the hammer price.