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