Challenge: Straight II (Basic Editing)
Camera: Panasonic DMC-FZ18
Location: Sao Paulo city - Brazil
Date: Sep 24, 2009
Aperture: 5.6
ISO: 400
Shutter: 1/400
Galleries: Abstract, Architecture
Date Uploaded: Sep 29, 2009
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[Oct. 4th, 2009 06:57:57 PM]
Water clock at shopping Iguatemi Sao Paulo, Brazil
I took this info at wikipedia: "Only a few modern water clocks exist today. In 1979, French scientist Bernard Gitton began creating his Time-Flow Clocks, which are a modern-day approach to the historical version. His unique glass tube designs can be found in over 30 locations throughout the world, including one at the The Children's Museum of Indianapolis in Indianapolis, Indiana, Shopping Iguatemi in Sao Paulo,Brazil and Shopping Iguatemi in Porto Alegre, Brazil. There are other modern designs of water clocks, including the Royal Gorge water clock in Colorado, the Woodgrove Mall in Nanaimo, British Columbia, and in the Abbotsford Airport in Abbotsford, British Columbia.
Gitton's design relies on gravity powering multiple siphons; for example, after the water level in the minute or hour display tubes is reached, an overflow tube starts to act as a siphon and thus empties the display tube. Actual time keeping is done by a calibrated pendulum powered by a water stream piped from the clock's reservoir. The pendulum has a carefully-constructed container attached to it; this measures the water that is then poured into display system.
Today, the use of water flow to power a clock is a rarely-practiced art, whose purpose is more for show and novelty than for functional accuracy, an example being the Hornsby Water Clock in Sydney, Australia."
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