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Member Products:17-inch Galileo Thermometer

17-inch Galileo Thermometer

$55.00 Sale Price:   $19.99

Price: $55.00 Sale Price:   $19.99

Item# :1075151

Qty: Available, ready to ship.





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Art meets science in this colorful glass thermometer. In 1593, Italian physicist Galileo invented a thermometer based on the principles of relative density. Individually calibrated weights containing a mixture of ethanol and dye float in a sealed tube with de-aromatic oil where they rise and fall with the temperature and the resulting changes in liquid density.


Not available for shipment outside of the 48 contiguous United States. Expedited shipping is not available for these items. This item cannot ship to a PO/APO/FPO Box.


Displays temperatures in Fahrenheit in 2° increments from 68° to 80°. Accurate to within 2°. 17"H.

In the 2nd century B.C., Greek scholar Archimedes discovered the law that states any object in a fluid displaces its own weight of fluid. He went a step further when he described the principle of buoyancy—that if an object is more dense than an equal volume of water, it sinks; if it's less dense, it floats. A simplified way of understanding density in this example is that it's the relative "heaviness" of objects of the same volume—a marshmallow is less dense than a marble of the same size and shape.


Almost 2,000 years later, Italian scientist Galileo discovered that a liquid's density is affected by changes in temperature. As temperatures rise, a liquid's density decreases. This means that objects that float in room temperature water would sink as the water is heated. He applied his discovery to create what is now known as a Galileo thermometer.


In a Galileo thermometer, sealed glass bubbles filled with a mixture of ethanol and dye have weights attached that are marked with different degrees Fahrenheit. The bubbles are suspended in a tube of de-aromatic oil. The weights give the bubbles different densities from each other and from the liquid in the tube.


When the atmospheric temperature rises, the density of liquid in the tube decreases, which changes the relative density of the glass bubbles. So, as the temperature increases, the liquid's density decreases, which means more bubbles will sink because they are now more dense than the surrounding liquid. At the highest temperatures, the lightest (least dense) bubble will finally sink. When temperatures drop, the opposite happens and more bubbles rise.


To read a Galileo thermometer, look at the lowest hanging bubble in the middle of the tube—the one that is not entirely sunk, nor entirely floating at the top. This bubble is in equilibrium with the surrounding liquid, and its tag will tell the current temperature.


REVIEW SNAPSHOT®

by PowerReviews
17-inch Galileo Thermometer
 
4.0

(based on 24 reviews)

Ratings Distribution

  • 5 Stars

     

    (13)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (2)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (3)

78%

of respondents would recommend this to a friend.

Pros

No Pros

Cons

No Cons

Best Uses

No Best Uses
    • Was this a gift?:
    • Yes (6), No (4)

Most Liked Positive Review

 

This is fascinating!

It is fairly accurate and is a decorative piece of science from the past. It is fun to watch the balloons change with the temperature.

It is fairly accurate and is a decorative piece of science from the past. It is fun to watch the balloons change with the temperature.

VS

Most Liked Negative Review

 

Temperature range too narrow

When the snow falls, the wind blows, and the cabin chills. Room temperature is a big item. Should we turn up the fireplace? Grab an extra blanket? Hot tea, anyone? Having...Read complete review

When the snow falls, the wind blows, and the cabin chills. Room temperature is a big item. Should we turn up the fireplace? Grab an extra blanket? Hot tea, anyone? Having a temperature range of 68 degrees to warmer temps does not do it for dwelling on a mountain. Want a range of 55 degrees to 75 degrees, please. Thermostats are for wusses.

Reviewed by 24 customers

Displaying reviews 1-10

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5.0

Cool gift

By SueL

from SC

Verified Buyer

Pros

  • Fun
  • Unique

Cons

    Best Uses

    • Office

    Comments about 17-inch Galileo Thermometer:

    Makes a cool gift. Comes as shown. Nothing to put together. Easy to learn.

    • Was this a gift?:
    • Yes
     
    5.0

    Great looking and very accurate

    By Sue

    from Chicago suburbs

    Pros

    • Very Educational

    Cons

      Best Uses

        Comments about 17-inch Galileo Thermometer:

        We use this to find temperature changes in each room of the house, the kids love it!

        • Was this a gift?:
        • Yes
         
        2.0

        Pretty but doesn't work

        By Judy

        from Baton Rouge, Louisiana

        Comments about 17-inch Galileo Thermometer:

        Was excited to find this item in your catalogue as it was the perfect gift for my brother. Though pretty to look at, it doesn't work. It won't indicate a temperature below 76 when exposed to temperatures known to be below 70... The 74 degree float stays at the bottom no matter what... very disappointing!!!

        • Was this a gift?:
        • Yes

        (2 of 2 customers found this review helpful)

         
        5.0

        I would give this product as a gift!

        By Pat

        from Atherton, CA

        Verified Buyer

        Pros

        • BEAUTIFUL
        • Fun to watch
        • Tells The Temp

        Cons

        • NOT VERY STABLE
        • will break if dropped

        Best Uses

        • Tell Temp
        • very pretty

        Comments about 17-inch Galileo Thermometer:

        This is a beautiful piece of art that also tells the temp. You just have to put it somewhere where it will not get knocked over and our of the reach of kids. I love the product and would purchase another one.

        • Was this a gift?:
        • No

        (1 of 1 customers found this review helpful)

         
        4.0

        Stylish,great bookshelf piece!

        By Majorprm

        from U.S.

        Verified Buyer

        Comments about 17-inch Galileo Thermometer:

        Buy for decorating more than function.

        • Was this a gift?:
        • Yes

        (1 of 2 customers found this review helpful)

         
        1.0

        Does not work correctly

        By Bozo Bob

        from Daytona beach , Fl

        Verified Reviewer

        Pros

          Cons

            Best Uses

            • Got It To Replacea
            • Got It To Replace One Tha

            Comments about 17-inch Galileo Thermometer:

            not accurate. temperature is 3 degrees colder than all other instruments in the home. I purchased this to replace one that was broken by accident. The first one was great.( it was a gift from my son )

            • Was this a gift?:
            • No

            (2 of 2 customers found this review helpful)

             
            3.0

            Temperature range too narrow

            By skier Bob

            from Whitefish, Montana @ 4613 feet

            Verified Buyer

            Pros

            • Attractive
            • Quick shipping

            Cons

            • Comfort Zone 60-75 Degree
            • Does Not Show Low Temps
            • House Kept 60 In Winter
            • Lowest Temp 68 Degrees
            • Night Temps Go To 55 Degr

            Best Uses

              Comments about 17-inch Galileo Thermometer:

              When the snow falls, the wind blows, and the cabin chills. Room temperature is a big item. Should we turn up the fireplace? Grab an extra blanket? Hot tea, anyone? Having a temperature range of 68 degrees to warmer temps does not do it for dwelling on a mountain. Want a range of 55 degrees to 75 degrees, please. Thermostats are for wusses.

              • Was this a gift?:
              • Yes

              (3 of 3 customers found this review helpful)

               
              4.0

              Decrative and useful

              By Byrddog

              from Texas

              Verified Buyer

              Pros

              • Pleasant In Appearance

              Cons

                Best Uses

                  Comments about 17-inch Galileo Thermometer:

                  Its basically "Eye Candy". Have seen them before and always wanted one. Like it very much.

                  • Was this a gift?:
                  • No

                  (3 of 3 customers found this review helpful)

                   
                  4.0

                  A piece of galileo in your home!

                  By Fullmoonwalker

                  from New Rochelle, NY

                  Verified Buyer

                  Comments about 17-inch Galileo Thermometer:

                  Useful within the home but not outside due to limited temperature range.
                  Still, a satisfying, marvelous inventive way of gauging the temperature

                  • Was this a gift?:
                  • Yes

                  (4 of 4 customers found this review helpful)

                   
                  5.0

                  This is fascinating!

                  By Bubbe

                  from Surprise, AZ

                  Verified Buyer

                  Pros

                  • Is Fun To Watch Balloons

                  Cons

                  • none

                  Best Uses

                  • For Decor And Temp

                  Comments about 17-inch Galileo Thermometer:

                  It is fairly accurate and is a decorative piece of science from the past. It is fun to watch the balloons change with the temperature.

                  • Was this a gift?:
                  • No

                  Displaying reviews 1-10

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