One of four photographs showing an enlarged portions of the Sun's visible disc
One of four photographs in window mounts showing an enlarged portions of the Sun's visible disc. Taken by Dr Janssen at the Meudon Observatory, Paris on 10th May 1878.One of four photographs in window mounts showing an enlarged portions of the Sun's visible disc. Taken by Dr Janssen at the Meudon Observatory, Paris on 10th May 1878.