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Caroline Herschel's telescope, 1795-1816

Caroline Herschel's telescope, 1795-1816

1795-1816
Speculum Metal Mirror, 1860

Speculum Metal Mirror, 1860

1860
Small hand Gregorian reflecting telescope

Small hand Gregorian reflecting telescope

1750
Pocket reflecting telescope in leather case.

Pocket reflecting telescope in leather case.

1740-1800
reflection diffraction grating on speculum metal

reflection diffraction grating on speculum metal

1879
Hadley's Gregorian reflecting telescope, c.1740

Hadley's Gregorian reflecting telescope, c.1740

1740-1744
Gregorian reflecting telescope of 2 1/2 inch aperture, with stand, tripod and case

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

1808-1850
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
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
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
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
Concave mirror on stand. See note below.

Concave mirror on stand

1752
Gregorian reflecting telescope of 2 1/2 inch aperture and 18 inch focal length by Benjamin Martin, London, on an altazimuth stand with a folding claw foot tripod and oak case.

Gregorian reflecting telescope of 2 1/2 inch aperture and 18 inch focal length by Benjamin Martin

1738-1777
Gregorian reflecting telescope of 2 1/8 inch aperture with shagreen covered tube and wooden case. The telescope has a ball and socket stand with a claw foot tripod and a mahogany stand made by the Science Museum workshops. Attached to the wooden stand is another ball and socket mounting with screw stand added by Mr T H Court, the donor.

Gregorian reflecting telescope of 2 1/8 inch aperture with shagreen covered tube and wooden case

1724-1731
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