Demainbray's cometarium

Made:
1750-1760 in London
maker:
Stephen Charles Triboudet Demainbray

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Desagulier's Cometarium, c. 1755. This is one of the few objects to carry the name of Dr. Stephen Demainbray
King's College, London| Enquiries to Science Museum, London
© The Board of Trustees of the Science Museum

Desagulier's Cometarium, c. 1755. This is one of the few objects to carry the name of Dr. Stephen Demainbray
King's College, London| Enquiries to Science Museum, London
© The Board of Trustees of the Science Museum

Cometarium, c. 1755. This is one of the few objects to carry the name of Dr. Stephen Demainbray (1710-1782), the 18th
King's College, London| Enquiries to Science Museum, London
© The Board of Trustees of the Science Museum, London

Cometarium, c. 1755. This is one of the few objects to carry the name of Dr. Stephen Demainbray (1710-1782), the 18th
King's College, London| Enquiries to Science Museum, London
© The Board of Trustees of the Science Museum, London

Cometarium, c. 1755. This is one of the few objects to carry the name of Dr. Stephen Demainbray (1710-1782), the 18th
King's College, London| Enquiries to Science Museum, London
© The Board of Trustees of the Science Museum, London

Cometarium, c. 1755. This is one of the few objects to carry the name of Dr. Stephen Demainbray (1710-1782), the 18th
King's College, London| Enquiries to Science Museum, London
© The Board of Trustees of the Science Museum, London

Cometarium, c. 1755. This is one of the few objects to carry the name of Dr. Stephen Demainbray (1710-1782), the 18th
King's College, London| Enquiries to Science Museum, London
© The Board of Trustees of the Science Museum, London

Cometarium, c. 1755. This is one of the few objects to carry the name of Dr. Stephen Demainbray (1710-1782), the 18th
King's College, London| Enquiries to Science Museum, London
© The Board of Trustees of the Science Museum, London

Cometarium made according to Desagulier's design, by unknown maker, London, 1750-1760. Once belonged to Stephen Demainbray.

This is one of the few objects to carry the name of 'Dr. Stephen Demainbray', who used it in his lectures on natural philosophy. This model was used to explain the path of a comet and was originally designed by Desaguliers, at one time a mentor of Demainbray. The central brass ball represents the Sun and the smaller ball in the elliptical groove represents the coment. When the handle was turned the comet moved round the ellipse while the pointer on the upper dial gave the time. The lines show that equal areas are swept out in equal times. Demainbray worked as superintendent at the King's observatory at Kew from 1768 and his collection of instruments and apparatus was absorbed into the King's own collection

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Science Museum: Science City

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Details

Category:
King George III
Object Number:
1927-1254
Materials:
box (wood), brass (modern replacement), glass, oak, paper (fibre product) and steel (metal)
Measurements:
overall (flat): 110 mm x 500 mm x 315 mm, 4.3 kg
type:
demonstration models
taxonomy:
  • disciplines
  • disciplines
  • science
  • natural sciences
  • physical sciences
credit:
King's College, London

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