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Chaney Instrument 17-Inches Galileo Thermometer | 
 enlarge | Brand: Chaney Instruments
Category: Lawn & Patio
List Price: $34.38
Buy New: $18.04
You Save: $16.34 (48%)
New (12) from $18.04
Avg. Customer Rating:  2 reviews
Sales Rank: 17425
Platform: Windows
Color: glass
Autographed: No
Memorabilia: No
Shipping Weight (lbs): 5.2
Dimensions (in): 3 x 3 x 17
MPN: 746
Model: 00746
UPC: 072397007467
EAN: 0072397007467
ASIN: B000A3IMYI
Availability: Usually ships in 1-2 business days
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| Features:
| • | 17-inch cylindrical thermometer | | • | Designed after one of Galileo's gravitational discoveries | | • | Colorful, liquid filled spheres descend and ascend with changes in temperature | | • | Mouth-blown glass | | • | Liquid magnifies temperature readings displayed in Fahrenheit and Celsius |
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| Editorial Reviews:
Product Description
17 inch Tall Galileo Thermometer Galileo thermometersandnbsp;bring together art and science in a unique thermometer. Based on a thermoscope invented by Galileo in the early 1600s, the thermometer;is called a Galileo thermometer. A simple, fairly accurate thermometer, today it is mostly used as decoration. The Galileo thermometer consists of a sealed glass tube that is filled with water and several floating bubbles. The bubbles are glass spheres filled with a colored liquid mixture. This liquid mixture may contain alcohol, or it might simply be water with food coloring. An object immersed in a fluid experiences two major forces: the downward pull of gravity and the upward push of buoyancy. It is the downward force of gravity that makes this thermometer work. Attached to each bubble is a little metal tag that indicates a temperature. A number and degree symbol are engraved in the tag. These metal tags are actually calibrated counterweights. The weight of each tag is slightly different from the others. Since the bubbles are all hand-blown glass, they aren't exactly the same size and shape. The bubbles are calibrated by adding a certain amount of fluid to them so that they have the exact same density. So, after the weighted tags are attached to the bubbles, each differs very slightly in density (the ratio of mass to volume) from the other bubbles, and the density of all of them is very close to the density of the surrounding water. The basic idea is that as the temperature of the air outside the thermometer changes, so does the temperature of the water surrounding the bubbles. As the temperature of the water changes, it either expands or contracts, thereby changing its density. So, at any given density, some of the bubbles will float and others will sink.;The lowest bubble in the top set of bubbles indicates the approximate current temperature. Consider this example: Let's say there are five bubbles in the thermometer: A blue bubble that represents 60 degrees /liA y
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| Customer Reviews:
 Broken May 30, 2008
1 out of 5 found this review helpful
When I received the thermometer it was shattered and the mercury was all over. I couldn't even take it out of the box. Don't order this item through the mail. Just go get it at Menards.
 Nice Galileo Thermometer... February 27, 2008
2 out of 2 found this review helpful
I've wanted one of these for many years, and saw Amazon had them for sale at reasonable prices. I will admit I was worried about them shipping a glass/liquid container across the country and getting it in one piece. Turns out the nerves were unfounded as it is a pretty sturdy piece of glass, and doesn't feel thin or cheap. Nice looking thermometer, and for a respectable price. I couldn't be happier with my purchase.
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