Brass component from "Twin Equatorial" Telescope (telescope - Cassegrain; telescope - refracting; telescope - reflecting)
Twin reflecting and refracting telescopes on observatory mounting, 1885 (telescope - Cassegrain; telescope - refracting; telescope - reflecting)
Photograph of the Ring Nebula in the constellation of Lyra (M57) (black-and-white prints (photographs); astrophotographs; planetary nebulae)
Photograph of the Double Star Cluster (H.VI.33&34) in the constellation of Perseus (black-and-white prints (photographs); astrophotographs; star clusters)
Photograph of 'Praesepe' the beehive star cluster (M44) (black-and-white print (photograph); astrophotograph; star cluster)
Photograph of stars centred on the star Gamma Cassiopeia (black-and-white prints (photographs); astrophotographs; stars)
Photograph of the Great Orion Nebula (M42) (black-and-white prints (photographs); astrophotographs; nebulae)