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.





Wakakusa Yamayaki The Mountain Burning Festival

Kangana Ranaut Refuses Irrfan

Lisa Haydon have fun with Hula Hoop

Jasmin Walia at Lelo Hex Launch Party in London

Priyanka Chopra Maxim Magazine JuneJuly 2016

Meet Aalia Ebrahim Daughter of Pooja Bedi

Jacqueline Fernandez might be a Criminal as per Law

Sony Charishta Looks Beyond Gorgeous in Saree