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Demainbray's polemoscope

Demainbray's polemoscope

1701-1752

Gregorian reflecting telescope, 1748-1788

Gregorian reflecting telescope, 1748-1788

1748-1788

Whirling speculum mirror with components

Whirling speculum mirror with components

1762

Brass Cassegrain reflecting telescope of 3 inch aperture, with altazimuth mount, stand and accessories

Brass Cassegrain reflecting telescope of 3 inch aperture, with altazimuth mount, stand and accessories

1790-1835

Reflecting telescope with trolly stand, 1767-1768

Reflecting telescope with trolly stand, 1767-1768

1767-1768

Gregorian reflecting telescope of 6 inch aperture and 30 inch focal length by Thomas Morton

Gregorian reflecting telescope of 6 inch aperture and 30 inch focal length by Thomas Morton

1817-1862

Brass Gregorian reflecting telescope by George Adams

Brass Gregorian reflecting telescope by George Adams

1734-1796

Aquatic microscope by J. Cuff with extra stand No. 34 and fishskin case

Aquatic microscope by J. Cuff with extra stand No. 34 and fishskin case

1745

Large Diffraction Astronomical Spectroscope to Thorp's design with two prism

Large Diffraction Astronomical Spectroscope to Thorp's design with two prism

1910-1920

Solar microscope accessory

Solar microscope accessory

1753

Scioptic ball, ostensibly by George Adams

Scioptic ball, ostensibly by George Adams

Small Newtonian telescope, on stand (not original)

Small Newtonian telescope, on stand (not original)

Brass Gregorian reflecting telescope

Brass Gregorian reflecting telescope

1850-1855

Scioptic ball and mirror

Scioptic ball and mirror

Scioptic ball, ostensibly by George Adams

Scioptic ball, ostensibly by George Adams

Mirror for Short's reflecting telescope

Mirror for Short's reflecting telescope

1760-1762

Mirror for Short's reflecting telescope

Mirror for Short's reflecting telescope

1767-1768

Aquatic microscope by J. Cuff

Aquatic microscope by J. Cuff

1745

Speculum mirror for Gregorian telescope

Speculum mirror for Gregorian telescope

1753-1755

speculum mirror, 1783-1785

speculum mirror, 1783-1785

1783-1785

Gregorian reflecting telescope, 1748-1788

Gregorian reflecting telescope, 1748-1788

1748-1788

Speculum mirror of 2 1/2-inch aperture

Speculum mirror of 2 1/2-inch aperture

1756-1758

Case for aquatic microscope by Cuff

Case for aquatic microscope by Cuff

1745

Gregorian reflecting telescope of 1 1/4 inch aperture by Watkins

Gregorian reflecting telescope of 1 1/4 inch aperture by Watkins

1747-1784

Primary speculum mirror of 13 1/4-inch diameter

Primary speculum mirror of 13 1/4-inch diameter

1840-1850

Gregorian reflecting telescope

Gregorian reflecting telescope

Gregorian reflecting telescope of 2 5/8 inch aperture and 16 inch focal length by Thomas Wright

Gregorian reflecting telescope of 2 5/8 inch aperture and 16 inch focal length by Thomas Wright

1826-1842

Speculum mirror of 6 1/4-inch diameter in brass cell with tinplate cover for 7-foot telescope owned by Caroline Herschel, late 18th century.

Newtonian reflecting telescope, 1795-1816

1795-1825

Four primary metal speculum metal mirrors, three of 4 1/2- inch diameter and one of 8 5/8 inch mirror with central circular hole. Donated by Lieutent General A, de Gorloff who lived at Nasmyth's former home of Hammerfield near Penshurst in Kent. Four similar mirrors were originally donated but one was returned to be replaced by the larger one [see file for details].

Four primary metal speculum metal mirrors

1840-1850

Scioptic ball probably made by Adams, George, 1750-1795

Scioptic ball probably made by Adams

Brass Gregorian reflecting telescope of 7-inch aperture, 2 eye pieces, two tin boxes for 6 concave mirrors, with mahogany tripod stand (box to J.F.W. material 23/8/28)

Brass Gregorian reflecting telescope of 7-inch aperture

1800-1890

Gregorian telescope

Gregorian telescope, c. 1745.

1740-1750

Nine inch mirror of speculum metal (exact diam" 8 15/16 in) in tinplate circular case

Mirror of speculum metal in tinplate circular case

1780-1820

Brass Gregorian reflecting telescope of 3-inch aperture, by John Bird, London with altazimuth mount on claw foot stand, inscribed "J. BIRD"

Gregorian reflecting telescope, 3-inch aperture and altazimuth mount

1750-1760

Oval shaped secondary speculum mirror from the 6-foot Rosse telescope

Oval shaped secondary speculum mirror

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.

Set of 3 metal cases for secondary speculum mirrors

1767-1768

Speculum mirror of of 4 3/8-inch aperture for Gregorian telescope by James Short, London [42/1195 = 24].

Speculum mirror of of 4 3/8-inch aperture for Gregorian telescope by James Short

1763-1765

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.

Reflecting telescope with 9-inch speculum mirror by James Short

1767-1768

Brass Gregorian reflecting telescope of 2 3/4-inch aperture by Edward Nairne, London on altazimuth mounting with claw foot tripod and wooden case with no key.

Brass Gregorian reflecting telescope of 2 3/4-inch aperture by Edward Nairne

1749-1774

Elliptical plane mirror (diagonal flat for Newtonian telescope) minor axis 1 1/2", major axis 2" in (full) soldered in usual way to circular brass disc, cylindrical cover of brass 1 3/4" deep, cover of brass 1 3/4" deep, cover and brass disc inscribed 1 "A4"

Elliptical plane mirror (diagonal flat for Newtonian telescope) minor axis 1 1/2"

1780-1820

Brass Gregorian reflecting telescope of 2 1/2-inch aperture by James Short, London [244/1063=9.6], on an altazimuth mounting with box foot stand made from telescope case containing 2 eyepieces, brass mirror box and accessories.

Brass Gregorian reflecting telescope of 2 1/2-inch aperture by James Short

1760-1762

Brass Gregorian reflecting telescope of 2 1/2 inch aperture by James Watson, London with altazimuth mount on claw foot stand and wooden case. Accessories include 2 eyepieces and 2 secondary mirrors with metal tinplate box.

Brass Gregorian reflecting telescope of 2 1/2 inch aperture by James Watson

1780-1824

Gregorian Reflecting Telescope of 4 3/8-inch aperture by James Short, London [42/1195 = 24] on a folding claw-foot pillar stand.

Gregorian Reflecting Telescope of 4 3/8-inch aperture by James Short

1763-1765