Washington [Coast-survey]. Equatorial, 0m15 à 0m25 d’ouverture (titre original)

Washington [Coast-survey]. Equatorial, 0m16 d’ouverture (titre original)

Observatoire de Washington : Equatorial, 0m15 à 0m25 d’ouverture (titre original)

Lick Observatory : Central Roof, Vane and Anemometer (titre original)

Lick Observatory : Meridian Circle and Transit Houses (titre original)

Lick Observatory : Meridian Circle and Transit Houses (titre original)

Across the Hills and Valleys west of Mt. Hamilton [Lick Observatory] (titre original)

Lick Observatory : General View of Observatory, Peak and Buildings (titre original)

« Belvedere », the summer-house of Queen Anna in which Tycho Brahe established his provisory observatory at the end of 1600 and where he made some observations [until 1601] (titre original)

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)