Reflecting telescope with trolly stand, 1767-1768

Reflecting telescope with trolly stand, 1767-1768

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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.

Details

Parts

Reflecting telescope with 9-inch speculum mirror by James Short

Reflecting telescope with 9-inch speculum mirror by James Short

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

Set of 3 eyepieces for reflecting telescope of 9-inch aperture by James Short

Set of 3 eyepieces for reflecting telescope of 9-inch aperture by James Short, London, England, United Kingdom, 1767-1768

Materials:
brass and glass
Object Number:
1909-197 Pt2
type:
components , eyepieces and astronomical instruments
Brass eyepiece for the reflecting telescope of  9-inch aperture by James Short

Brass eyepiece for the reflecting telescope of 9-inch aperture by James Short

Brass eyepiece for the reflecting telescope of 9-inch aperture by James Short, London, England, United Kingdom, 1767-1768

Materials:
brass and glass
Object Number:
1909-197 Pt2/1
type:
components , eyepieces and astronomical instruments
Image ©
The Board of Trustees of the Science Museum
Part of:
1909-197 Pt2
Brass eyepiece for the reflecting telescope of  9-inch aperture by James Short

Brass eyepiece for the reflecting telescope of 9-inch aperture by James Short

Brass eyepiece for the reflecting telescope of 9-inch aperture by James Short, London, England, United Kingdom, 1767-1768

Materials:
brass and glass
Object Number:
1909-197 Pt2/2
type:
components , eyepieces and astronomical instruments
Image ©
The Board of Trustees of the Science Museum
Part of:
1909-197 Pt2
Brass eyepiece for the reflecting telescope of 9-inch aperture by James Short

Brass eyepiece for the reflecting telescope of 9-inch aperture by James Short

Brass eyepiece for the reflecting telescope of 9-inch aperture by James Short, London, England, United Kingdom, 1767-1768

Materials:
brass and glass
Object Number:
1909-197 Pt2/3
type:
components , eyepieces and astronomical instruments
Part of:
1909-197 Pt2
Set of 3 metal cases for secondary speculum mirrors

Set of 3 metal cases for secondary speculum mirrors

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.

Materials:
brass , speculum and tinplate
Object Number:
1909-197 Pt3
type:
components , storage boxes and instruments
metal case and speculum mirror

metal case and speculum mirror

metal cases for secondary speculum mirrors with supports and primary speculum mirrors for 9-inch reflecting telescope by James Short, London.

Object Number:
1909-197 Pt3/1
type:
mirror and case
Image ©
The Board of Trustees of the Science Museum
Part of:
1909-197 Pt3
metal case and speculum mirror

metal case and speculum mirror

metal cases for secondary speculum mirrors with supports and primary speculum mirrors for 9-inch reflecting telescope by James Short, London.

Object Number:
1909-197 Pt3/2
type:
mirror
Image ©
The Board of Trustees of the Science Museum
Part of:
1909-197 Pt3
metal case and speculum mirror

metal case and speculum mirror

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.

Object Number:
1909-197 Pt3/3
type:
mirror
Image ©
The Board of Trustees of the Science Museum
Part of:
1909-197 Pt3
Envelope containing screws for for 9-inch reflecting telescope

Envelope containing screws for for 9-inch reflecting telescope

Envelope containing screws for for 9-inch reflecting telescope by James Short, London.

Object Number:
1909-197 Pt3/4
type:
screws
Image ©
The Board of Trustees of the Science Museum
Part of:
1909-197 Pt3
Mirror for Short's reflecting telescope

Mirror for Short's reflecting telescope

Speculum mirror of 9 1/4-inch aperture for reflecting telescope by James Short, London [6/1364 = 49].

Measurements:
overall: 21 x 235 mm
Materials:
speculum and complete
Object Number:
1909-197 Pt4
type:
components , concave mirrors and metal mirrors
Image ©
The Board of Trustees of the Science Museum