XEE4134609: Joseph Janssen (1824-1907), French astronomer, member of the Academy of Sciences and director of the Observatoire d'astronomy physique de Meudon, in his salon in Meudon. (From a photograph by Mr. Dornac). Engraving in “” La Nature: revue des sciences et de leurs applications aux arts et a l'industrie”” of 19 October 1895., Dornac (Paul Francois Arnold Cardon) (1859-1941) / Bridgeman Images