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Refracting telescope on stand by Ramsden, Dollond and Miller, 1769

Refracting telescope on stand by Ramsden, Dollond and Miller, 1769

1769

Telescope with equatorial mounting

Telescope with equatorial mounting

1701-1800

Main Body for Refracting Telescope.

Main Body for Refracting Telescope.

1797

Refracting Telescope on Equatorial Stand

Refracting Telescope on Equatorial Stand

1769

Telescope with equatorial mounting

Telescope with equatorial mounting

1701-1800

Ramsden's astronomical equatorial instrument, with 2-1/4 inch aperture and 18-inch focal length

Ramsden's astronomical equatorial instrument, with 2-1/4 inch aperture and 18-inch focal length

1770-1780

Telescope with equatorial mounting

Telescope with equatorial mounting

1701-1800

Refracting telescope of 1 1/2 inch aperture and 13 inch focal length by Adams

Refracting telescope of 1 1/2 inch aperture and 13 inch focal length by Adams

1760-1780

Refracting telescope of 2 3/4 inch aperture and 18 inch focal length by Dollond, London, on an adjustable equatorial mount with a fitted mahogany case. Accessories include, 4 eyepieces, a wedge and an ivory annulus that fits to the objective lens for illuminating cross-hairs.

Refracting telescope on equatorial mounting, 1790-1810

1790-1810

Refracting telescope of 4.1-inch aperture on an English type equatorial mounting commissioned by Sir George Shuckburgh from Jesse Ramsden in 1781, though not completed until 1791. First installed at Shuckburgh's home at Shuckburgh Warwickshire, it was later given to the Royal Observatory, Greenwich in 1811 by Charles Jenkinson Shuckburgh's heir. The hour circle was re-divided by Troughton & Simms in 1860 but the stand proved too flimsy and was little used at Greenwich in later years.

Refracting telescope on equatorial mounting

1781-1791

Refracting telescope of 3 3/4 inch aperture and 5-foot focal length on English type equatorial mounting. Built in 1797 for Captain Huddart, Highbury, London with optics by Peter & John Dollond and mounting by Troughton. In 1816 it was acquired by Sir James South who used it with Sir John Herschel to observe double stars.

Refracting Telescope.

1797

Various accessories and components, including eyepieces and an object glass, for refracting telescope of 4.1-inch aperture on an English type equatorial mounting commissioned by Sir George Shuckburgh from Jesse Ramsden in 1781, though not completed until 1791

Accessories and components for refracting telescope on equatorial mounting

1781-1791

Refracting telescope of 1 1/2 inch aperture by Nairne & Blunt on an adjustable equatorial mounting with a tripod stand.

Refracting telescope

1774-1793

Baker refracting telescope of 1 3/16- inch aperture and 18 inch focal length by J. Sisson, London, on an adjustable equatorial mounting with a flat base stand and wooden case [RAS No.20]. Presented to the Royal Astronomical Society around 1869 by Baker?

Refracting telescope on equatorial stand, 1749-1783

1760-1783

Four components of refracting telescope of 4.1-inch aperture on an English type equatorial mounting commissioned by Sir George Shuckburgh from Jesse Ramsden in 1781, though not completed until 1791

Components of refracting telescope

1781-1791

Baker refracting telescope of 1 3/16- inch aperture and 18 inch focal length by J. Sisson, London, on an adjustable equatorial mounting with a flat base stand [RAS No.20]. Presented to the Royal Astronomical Society around 1869 by Baker?

Baker refracting telescope of 1 3/16- inch aperture and 18 inch focal length by J. Sisson

1760-1783

Refracting telescope of 2 inch aperture and 30 inch focal length, engraved, 'Ramsden London' on an equatorial stand by John Miller of Edinburgh. A label in the transit box states that the telescope was made by Peter & John Dollond for Jesse Ramsden.

Refracting telescope of 2 inch aperture and 30 inch focal length

1769

Refracting telescope of 1 1/2-inch aperture and 15-inch focal length by W & S Jones, London, on an adjustable equatorial mounting. Accessories include 3 dark glass filters, 4 reading eyepieces for the scales, a diagonal and a spirit lamp with stand [RAS No.136]. Presented to the Royal Astronomical Society in 1899 by Miss Moore.

Refracting telescope of 1 1/2-inch aperture and 15-inch focal length by W & S Jones

1825-1859

Refracting telescope of 2 3/4 inch aperture and 18 inch focal length by Dollond, London, on an adjustable equatorial mount. Accessories include, 4 eyepieces, a wedge and an ivory annulus that fits to the objective lens for illuminating cross-hairs.

Refracting telescope of 2 3/4 inch aperture and 18 inch focal length by Dollond

1790-1810

Circular section for a refracting telescope of 3 3/4 inch aperture and 5-foot focal length on English type equatorial mounting. Additional telescope pieces alongside main cylindrical section. Comprising mainly of various metal components including spirit level, adjustment handle, measuring microscope and metal tin for the 4 ½” lens. The telescope was built in 1797 for Captain Huddart, Highbury, London with optics by Peter & John Dollond and mounting by Troughton. In 1816 it was acquired by Sir James South who used it with Sir John Herschel to observe double stars.

Circular Section for Refracting Telescope.

1797

Accessories for Ramsden astronomical equatorial instrument, consisting of four eyepieces, two mirror digonals, a glass diagonal, two dark filter caps and a filar micrometer and reflector to illuminate the cross-hairs. Other miscellaneous parts include a small adjustor, loose parts in two pill boxes, a boxwood lid and a detached bar of unknown function.

Accessories for Ramsden astronomical equatorial instrument

1770-1780

Refracting telescope of 1 1/2-inch aperture and 36-inch focal length by John Smeaton on an adjustable equatorial mounting with a tripod stand. The telescope is fitted with an integral filar micrometer [RAS No.7] . Presented to Royal Astronomical Society in 1845 by Mrs Somerville to whom it was left by Mrs Dixon, Smeaton's daughter.

Refracting telescope of 1 1/2-inch aperture and 36-inch focal length

1770

Refracting telescope of 2 1/4 inch aperture and 36 inch focal length by Troughton, London on an adjustable equatorial mounting with spirit level and tripod stand and box. Accessories include, 2 eyepieces, key , diagonal and filar micrometer.

Refracting telescope of 2 1/4 inch aperture and 36 inch focal length by Troughton

1790-1826

Ramsden's patent (No.1112, 1775, Dec.30) Astronomical Equatorial Instrument with glazed Sheraton case, c.1775. Refracting telescope, 2-1/4 inch aperture and 18-inch focal length (probably by Peter Dollond), on an adjustable equatorial mounting with tripod stand. The stand is equipped with 3 spirit levels, 3 levelling screws and 2 scales read by verniers. Accessories include 5 eyepieces, two diagonal mirrors, glass prism, two dark filter caps and a filar micrometer with reflector to illuminate the cross hairs.

Ramsden's patent (No.1112, 1775, Dec.30) Astronomical Equatorial Instrument, with equatorial mounting, accessories, tripod and case

1770-1780

Refracting telescope of 1 1/2-inch aperture and 15-inch focal length by W. & S. Jones, London, on an adjustable equatorial mounting with wooden case. Accessories include 3 dark glass filters, 4 reading eyepieces for the scales, a diagonal and a spirit lamp with stand [RAS No.136]. Presented to the Royal Astronomical Society in 1899 by Miss Moore.

Refracting telescope of 1 1/2-inch aperture and 15-inch focal length by W. & S. Jones

1825-1859