Brass Gregorian telescope of 3 1/2 inch aperture by B. Martin

Made:: 1757-1761 in London

maker:: Benjamin Martin

Brass Gregorian telescope of 3 1/2 inch aperture by B. Martin, London on altazimuth stand with claw foot stand, 2 eyepieces and a wooden case. The instrument was used by John Winthrop to observe the 1761 transit of Venus. Given to Harvard College by Thomas Hancock of Boston Mass., it is thought to be the only instrument to survive the fire of 1764.

Details

Category:: Astronomy

Object Number:: 1911-283

Materials:: brass, speculum metal and complete

type:: telescope - gregorian and telescope - reflecting

credit:: Donated by Mr Thomas H. Court (Court Collection)

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Parts

Wooden case for Gregorian telescope of 3 1/2 inch aperture by B. Martin

Wooden case for Gregorian telescope of 3 1/2 inch aperture by B. Martin, on altazimuth stand

Materials:: wood and incomplete

Object Number:: 1911-283 Pt1

type:: components , storage boxes and instruments

Gregorian telescope, 3.5 inch aperture

Brass Gregorian telescope of 3 1/2 inch aperture by B. Martin, London on altazimuth stand with claw foot stand, 2 eyepieces. The instrument was used by John Winthrop to observe the 1761 transit of Venus. Given to Harvard College by Thomas Hancock of Boston Mass., it is thought to be the only instrument to survive the college fire of 1764.