Refracting telescope with 5.9-inch aperture lens, brass tube and English type equatorial mounting and clockwork drive Astronomy 1829
The first 48-inch speculum mirror cast by Sir William Herschel in 1785 for his 'Forty-Foot' telescope at Slough, England. Original mirror for William Herschel's forty-foot telescope, 1785. Astronomy 1785
Six-foot speculum [metal] mirror on travelling carriage from the Great Rosse Telescope, the 'Leviathan of Parsonstown', built by the Third Earl of Rosse at Birr, Ireland, 1844-46. Mirror for the Great Rosse Telescope, 1844-1846 Astronomy 1844-1846
Map of Europe marked with the paths of totality for solar eclipses during the 20th century Astronomy 1927
Photograph of the instruments used by the British expedition when observing the 1919 total solar eclipse in Brazil. Astronomy 1919
