Looking through the French archives for traces of Pierre Berniard’s stay in Poland and his correspondence with Jean Hermann.

The paper presents research findings on the stay and scientific work of Pierre Berniard in Poland. This French chemist lived in Poland for about twenty years in the late eighteenth century. He was hired as a scientist by the rich aristocratic Wielopolski family from Pińczów. The authors analysed his publications and unpublished correspondence with Jean Hermann, a scholar and the founder of Cabinet of Natural History in Strasbourg. They have identified a large network of Berniard’s scientific correspondents and his contribution to geology. The existence of a written account of his stay in Poland, now lost, was raised by his letters to Hermann