Reflecting telescope by William Herschel, 1783-1785

Made:
1783-1785 in Bath
maker:
William Herschel

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Pamphlet written in the hand of William Herschel giving instructions for the use of his Newtonian reflecting telescope
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Pamphlet written in the hand of William Herschel giving instructions for the use of his Newtonian reflecting telescope
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Pamphlet written in the hand of William Herschel giving instructions for the use of his Newtonian reflecting telescope
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Pamphlet written in the hand of William Herschel giving instructions for the use of his Newtonian reflecting telescope
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Pamphlet written in the hand of William Herschel giving instructions for the use of his Newtonian reflecting telescope
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Pamphlet written in the hand of William Herschel giving instructions for the use of his Newtonian reflecting telescope
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Pamphlet written in the hand of William Herschel giving instructions for the use of his Newtonian reflecting telescope
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Pamphlet written in the hand of William Herschel giving instructions for the use of his Newtonian reflecting telescope
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Pamphlet written in the hand of William Herschel giving instructions for the use of his Newtonian reflecting telescope
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Pamphlet written in the hand of William Herschel giving instructions for the use of his Newtonian reflecting telescope
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Pamphlet written in the hand of William Herschel giving instructions for the use of his Newtonian reflecting telescope
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Pamphlet written in the hand of William Herschel giving instructions for the use of his Newtonian reflecting telescope
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Pamphlet written in the hand of William Herschel giving instructions for the use of his Newtonian reflecting telescope
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Pamphlet written in the hand of William Herschel giving instructions for the use of his Newtonian reflecting telescope
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Page from Pamphlet written in the hand of William Herschel giving instructions for the use of his Newtonian reflecting
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Speculum mirror of 6 1/8-inches and 7-foot focal length in brass cell for Newtonian telescope with altazimuth stand,
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Speculum mirror of 6 1/8-inches and 7-foot focal length in brass cell for Newtonian telescope with altazimuth stand,
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Speculum mirror of 6 1/8-inches and 7-foot focal length in brass cell for Newtonian telescope with altazimuth stand,
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Newtonian reflecting telescope with 6 1/8-inch diameter speculum mirror of 7-foot focal length with mahogany tube and altazimuth stand plus accessories. Made by William Herschel for his friend Sir William Watson in Bath, 1783-1785.

Dated to about 1783--5, this reflecting telescope was made by the famous astronomer, William Herschel for his good friend Dr Watson who he first met in Bath. The telescope has a mahogany 7-foot tube and stand that is operated using pulley ropes and gears. The heart of the telescope is a 6 1/8-inch mirror made of speculum metal, a bronze alloy with arsenic added for a more reflective surface. Herschel ground and polished all his own mirrors and lenses then had them built into telescopes that he sold to make to supplement his income as royal astronomer to King George III. His patron purchased several instruments while the King of Spain ordered a massive telescope with a 24-inch mirror.

Details

Category:
Astronomy
Object Number:
1876-1000
Materials:
brass, glass, mahogany, speculum metal
Measurements:
overall (estimate): 1800 mm x 1500 mm x 500 mm, 156 kg
type:
telescope - reflecting
taxonomy:
  • disciplines
  • disciplines
  • science
  • natural sciences
  • physical sciences
  • furnishing and equipment
  • tools & equipment
  • optical instrument
  • telescope
  • telescope - reflecting
  • furnishing and equipment
  • tools & equipment
  • optical instrument
  • telescope
credit:
Smith, E.

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