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Old Dec 12, 2006, 11:29 AM   #1
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See if you can identify this object. I'll post a shot of the entire object later.

Nikon D100, Sigma 28-70mm f2.8 lens, 12mm extension tube, WB=Incandescant, Self-Timer, Tripod, 10 seconds at f32.



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Old Dec 12, 2006, 2:58 PM   #2
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It's a thermometer.
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Old Dec 12, 2006, 4:17 PM   #3
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A little more specific, A Galileo thermometer. The balls raise and lower depending on the temp.

Nice shot Cal.

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Old Dec 12, 2006, 4:29 PM   #4
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I was waiting to see what other guesses might be posted or if someone had a more specific answer. Mugmar, you hit the nail on the head. It is, indeed, a Galileo thermometer. An invention by a famous astronomer that has nothing to do with astronomy! Who knew?



This device works by balancing the little spheres with the density of the liquid in the column. As the temperature increases, the density of the liquid decreases and more of the spheres drift to the bottom. Each sphere has a tag with a number etched on it. The bottom sphere in the group at the top indicates the current temperature. In this particular model, each sphere represents a 4-degree increment.

If you want to learn more or purchase one of these, go to your local science store or science museum. They come in several different sizes.

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Old Dec 12, 2006, 5:27 PM   #5
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An interesting object! Donna
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Old Dec 12, 2006, 9:21 PM   #6
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Thanks all. We got this as a table gift at my wife's office Christmas party which was held at the Oregon Museum of Science and Industry a little over a week ago.

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Old Dec 14, 2006, 1:25 AM   #7
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Cal,

Nice job. I once tried to buy one of these as a gift for someone in Hawaii. Ordering them by the Internet is not as easy as it might seem for shipment from the mainland to Hawaii.

Many varieties cannot be shipped because of the flammable fluid inside.

Aloha
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Old Dec 14, 2006, 4:42 AM   #8
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got one in my living room thus it was easy to identify
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