Amazon.com Product Description
A lovely conversation starter and a fun example of early scientific measurement, this Galileo thermometer and barometer set from Chaney Instrument engages the eye while monitoring the weather. Designed for approximate interpretation of temperature and general prediction of fair or foul weather, the set features glass instruments that rely on the principles of buoyancy and air pressure for their function. In the thermometer, the brightly colored internal spheres rise and lower with fluctuations in temperature and corresponding density. The ball-shaped barometer shifts liquid to and from its curved spout in response to changes in the air. Both pieces are beautifully shaped, and the barometer features a lovely etching of the Earth’s continents. A wooden base makes the set easily displayable on desk or bookshelf. Delightful for gift giving, the unit measures approximately 8 inches long and stands 8 inches high.
This handsome unit uses a blend of old and new technology to interpret the weather. The Galileo thermometer is filled with a clear liquid that suspends multiple colored weights. As the liquid within the weights changes temperature their density changes allowing the weights to rise or fall. The lowest weight at the very top of the Galileo reflects the temperature. The glass water barometer indicates changes in the air temperature. A low fluid level in the glass spout generally means fair weather while a higher fluid level in the glass spout means foul weather approaches.