Colorful thermometer - — Galileo thermometer

Everybody knows Galileo did the experiment on the Leaning Tower of Pisa, he is in the 16th century Italian scientist, he even invented the thermometer! According to the principle of heat bilges cold shrink in 1593, Galileo invented the world's first a thermometer. Then many of the scientists invented according to Galileo thermometer, further improve the thermometer, makes the measurement of the thermometer is becoming more and more accurate. Now, Galileo thermometer thermometer is a handicraft, but the principle is like Galileo's first thermometer. Is the temperature change caused by density and physical principle of buoyancy change, used to display the current temperature. That the shape of the thermometer is a brightly colored glasswares, glass bottles in size seven color ball, engraved with the metal card Numbers hanging below the ball. Each ball metal card 2 degrees. When the ball is suspended at the top of the glass bottle, one of the most lower chromosphere of Numbers, is the temperature was probably value. Although this kind of thermometer at first glance and we are familiar with digital display, such as mercury thermometer have nothing in common. But it is indeed a thermometer! But its measuring range between 20 to 32 degrees Celsius only, don't be too demanding it to very precise. And the thermometer can also be as a beautiful adornment in the home and other places, not only beautiful but also can tell you that indoor temperature at any time.