Lord Rosse's telescope at Birr Castle, Ireland Daniell Aerial view of the Crystal

Aerial view of the Crystal Palace in Hyde Park

showing Queen Victoria seated in the foreground surrounded by her family and other guests

The man in the chair

ships ‘Alert’ and ‘Discovery’ by George Strong Nares

This treaty

Lord Rosse's telescope at Birr Castle, Ireland Daniell Aerial view of the CrystalMonoscopic view from a stereo image used to produce Plate 24 figure 5 from the paper 'On the construction of specula of six feet aperture; and a selection from the observations of nebulae made with them', by William Parsons, 3rd Earl of Rosse, Philosophical Transactions of the Royal Society, volume 151 (1861) pp. 681 746. The great telescope seen from the south east, the stage of the first gallery slightly raised. The instrument's scale is