Interior of the Equatorial Room of Professor Henry Draper’s Observatory at Hastings on Hudson, near New York […] showing the 28 inch Silvered Glass Reflector, the 12 inch Achromatic, and the 5 inch Finder (titre original)

Specola Vaticana : l’équatorial photographique Henry-Gautier (titre original)

L’Observatoire du Parc Montsouris (titre forgé)