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Ambient Weather WS-YG901 Galileo Thermometer and Glass Fluid Barometer |
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- Overall height: 11.4 inches tall
- Barometer height: 5.9 inches
- Number of glass balls: 5
- Glass Galileo thermometer range: 64ºF - 80ºF
- Temperature is determined by lowest floating bulb
- Glass barometer globe with frosted world map
- Low level of liquid in spout = high pressure and fair weather
- High level of liquid in the spout = deteriorating weather
- Attractive wood base
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. Attached to each bubble is a little metal tag that indicates a temperature. These metal tags are calibrated counterweights. The weight of each tag is slightly different from the others. Since the bubbles are all hand-blown glass, they arent 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.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 bubble that sinks the most indicates the approximate current temperature.
- Overall height: 11.4 inches tall
- Barometer height: 5.9 inches
- Number of glass balls: 5
- Glass Galileo thermometer range: 64ºF - 80ºF
- Temperature is determined by lowest floating bulb
- Glass barometer globe with frosted world map
- Low level of liquid in spout = high pressure and fair weather
- High level of liquid in the spout = deteriorating weather
- Attractive wood base
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