1-158-573 - Oxford Science Archive/Heritage Images

Jules Pierre Cesar Janssen, French astronomer, 1893. Janssen (1824-1907) at the eyepiece of his reflecting telescope at Meudon Observatory, France. An accident at a young age left him unable to walk or attend school. He worked as a bank clerk and eventually entered the Sorbonne, graduating in 1852. Janssen designed a spectroscope for viewing solar prominences during total eclipses. From La Science Illustree. (Paris, 1893).