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Pocket reflecting telescope in leather case.

1740-1800

Gregorian reflecting telescope of 2 1/2 inch aperture, with stand, tripod and case

1808-1850

reflection diffraction grating on speculum metal

1879

Speculum Metal Mirror, 1860

1860

Small hand Gregorian reflecting telescope

1750

Caroline Herschel's telescope, 1795-1816

1795-1816

Hadley's Gregorian reflecting telescope, c.1740

1740-1744
Four speculum metal secondary mirrors thought to have been made by James Nasmyth. Donated by Lieutent General A de Gorloff who lived at Nasmyth's former home of Hammerfield near Penshurst in Kent.

Four speculum metal secondary mirrors thought to have been made by James Nasmyth

1850-1870
The first 48-inch speculum mirror cast with metal cover by Sir William Herschel in 1785 for his 'Forty Foot' telescope at Slough, England.

Original mirror for William Herschel's forty-foot telescope, 1785.

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

1844-1846
Concave mirror on stand. See note below.

Concave mirror on stand

1752
Gregorian reflecting telescope of 2 1/2 inch aperture and a 16 inch focal length of 16 inches by John Cuff, London, on an altazimuth stand with folding claw foot tripod.

Gregorian reflecting telescope of 2 1/2 inch aperture and a 16 inch focal length of 16 inches by John Cuff

1737-1758
Brass Gregorian reflecting telescope of 3-inch aperture by John Cuthbert, London on altazimuth mount with claw foot stand and adjustable feet, 1852.

Gregorian reflecting telescope, 1852

1852