Solar pyrheliometer. A large instrument made of steel, brass and wood. Three small fan shaped steel plates which can be rotated are positioned over a long brass cylinder which extends from a squat wooden cylinder, suspended in a ring mount allowing the apparatus to be rotated in multiple directions.

ABDNP:201404a

Silver disk pyreheliometer for measuring the power in solar radiation. Instrument purchased from Smithsonian Institution who developed the device. Can be seen in use in the photograph of the total solar eclipse of 1927 taken on top of the Cromwell Tower at King's College. Radiation is measured by a thermopile. Central device on equatorial tracking mount on tripod stand.
Inscription: Lemur database

Early: 1920 Late: 1927

metal, approx tripod base 230 mm height 500 mm projecti

Physical Object