Register | Login


This crystal ball located outside Darwin Airport Meteorological Office, in Darwin, Australia, doesn’t look into the future, but provides invaluable information about the past. This antique technology, called a Campbell-Stokes sunshine recorder, is one of the simplest meteorological device that’s still in use today. It measures the intensity of sunshine on any given day the same way a thermometer measures temperature or a barometer measures air pressure.

The device consist of a solid glass sphere, typically about 4 inches in diameter, that concentrates the sun's rays to an intense spot on a calibrated paper, resulting in a burn. As the sun blazes across the sky, the hot image of the sun traces a scorching path on the paper. The intensity and the position of the burn indicates the time and the strength of the sunshine.

campbell–stokes-sunshine-recorder-5

A Campbell–Stokes sunshine recorder outside Darwin Airport Meteorological Office, in Darwin, Australia. Photo credit: Bidgee/Wikimedia

Read more »
© Amusing Planet, 2016.


Loading...


Poonam at Yuva Bharat Express Magazine Launch

Sunny Leone at Jackpot Movie Premiere Show

Chandi Perera Got Her Back Painted For Christmas

Rishika Spicy Photo Stills

Reva Spicy Photo Gallery

Creative Mom Uses Sleeping Baby to Create Adorable Photos

Bird Watching at Latrabjarg Cliffs, Iceland

new york city under snow