One of three photographs mounted in a glazed frame showing instruments at the Royal Observatory Greenwich around 1914. Airy Transit Circle, made by Troughton & Simms and Ransome & May in 1850, of 8.1-inch aperture and 11-feet, 7-inch focal length viewed from the south towards the eyepiece. [instruments at the Royal Observatory Greenwich] 1914
One of three photographs mounted in a glazed frame showing instruments at the Royal Observatory Greenwich around 1914. Christie's Altazimuth instrument (universal) made by Troughton & Simms May in 1896, of 8-inch aperture and 8-feet focal length viewed towards the eyepiece and lifted out of its pivots. [instruments at the Royal Observatory Greenwich] 1914
One of three photographs mounted in a glazed frame showing instruments at the Royal Observatory Greenwich around 1914. Christie's Altazimuth instrument (universal) made by Troughton & Simms May in 1896, of 8-inch aperture and 8-feet focal length viewed towards the eyepiece [instruments at the Royal Observatory Greenwich] 1914
Glass diapositive in passe-partout frame [X14] of a drawing by Mr Wesley [plate 14] showing the solar corona as seen from Sfase, Tunisia at the solar eclipse of August 30th, 1905. Glass diapositive of a drawing showing the solar corona at the eclipse seen from Tunisia
One of two profile gauges with convex profile which was used by the 3rd Earl of Rosse to measure the 72 inch mirrors used on the largest Rosse telescope. Profile gauge with convex profile