Galileo thermometer

Exposure Date: 2011:10:05 19:19:07;
ImageDescription: The Galileo thermometers are based on Galileo’s theories about how the universe worked.He discovered that liquid experiences density changes as the temperature changes. You can see this principle by watching Galileo thermometers, because you will notice that the colored glass balls inside rise or fall according to the temperature outside, which changes the density of the liquid they are floating in.Most Galileo thermometers have five colored glass balls inside of a large glass tube. The lowest of the floating glass balls will tell you what temperature it is outdoors;
Copyright: Dave Ashwin;
Make: Canon;
Model: Canon EOS-1D Mark IV;
ExposureTime: 1/4 s;
FNumber: f/13;
ISOSpeedRatings: 250;
ExposureBiasValue: 0/1;
Flash: Flash did not fire, compulsory flash mode;
FocalLength: 60 mm;
Software: Adobe Photoshop Elements 9.0 Windows;