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