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Reflecting telescope with speculum mirror of 9 1/4-inch aperture by James Short, London [6/1364 = 49] on equatorial stand arranged to be used as a Gregorian, Cassegrainian or Newtonian, with spare secondary mirrors in metal case and 3 eyepieces (two oak staves, small brass screws etc added in 1913).
Dated to around 1767--8, this reflecting telescope can be used with any of three different optical configurations by replacing the smaller mirror. Made by James Short then the foremost optical instrument maker in London, it has a 9-inch metal mirror. The telescope is mounted on Short's so called 'universal', a portable equatorial stand with a wooden fork holding the tube and an adjustable polar axis. The whole wooden framework moves on wheels and has carrying rods like a sedan chair. Selling for several hundreds pounds, a considerable sum at the time, an aristocratic dilettante would have originally purchased this extravagant telescope.
Reflecting telescope with 9-inch speculum mirror by James Short, London [6/1364 = 49] on equatorial stand arranged to be used as a Gregorian, Cassegrainian or Newtonian.
Set of 3 eyepieces for reflecting telescope of 9-inch aperture by James Short, London, England, United Kingdom, 1767-1768
Brass eyepiece for the reflecting telescope of 9-inch aperture by James Short, London, England, United Kingdom, 1767-1768
Brass eyepiece for the reflecting telescope of 9-inch aperture by James Short, London, England, United Kingdom, 1767-1768
Brass eyepiece for the reflecting telescope of 9-inch aperture by James Short, London, England, United Kingdom, 1767-1768
Set of 3 metal cases for secondary speculum mirrors with supports and 2 primary speculum mirrors for 9-inch reflecting telescope by James Short, London [6/1364 = 49] on equatorial stand.
metal cases for secondary speculum mirrors with supports and primary speculum mirrors for 9-inch reflecting telescope by James Short, London.
metal cases for secondary speculum mirrors with supports and primary speculum mirrors for 9-inch reflecting telescope by James Short, London.
metal cases for secondary speculum mirrors with supports and primary speculum mirrors for 9-inch reflecting telescope by James Short, London. This case has lots of additional parts in including two eye pieces and 13 other elements, possibly weights or adjustment parts.
Envelope containing screws for for 9-inch reflecting telescope by James Short, London.
Speculum mirror of 9 1/4-inch aperture for reflecting telescope by James Short, London [6/1364 = 49].
