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)