Earthenware oval plate commemorating Pierre Testu-Brissy who made the first observations of electrical charges in thunderclouds while ascended in a balloon, made by Faïence de Moustiers at Carnavalet Museum. Paris, France.

Earthenware oval plate commemorating Pierre Testu-Brissy who made the first observations of electrical charges in thunderclouds while ascended in a balloon, made by Faïence de Moustiers (Féraud) at Carnavalet Museum. Paris, France.