Photograph, Lord Rosse's telescope at Birr Castle, Ireland by [Mary Parsons, Countess of Rosse?] Stereoscopic pair of photographs.The great telescope seen from the north at a slight angle to the view selected for figure 8 of plate 24. The telescope is held low, with foreground detail of the crane winding mechanism on a platform behind the instrument. Not published in Philosophical Transactions. Stereoscopic pair of photographs. Subject: Scientific Instruments / Astronomy Received by the Royal Society on 5 June 1861. Read 20 June 1861. [1861]