Weather Ball Barometer

Sper Scientific 739750 Weather Ball Barometer

A Timeless Instrument for Predicting the Weather

Also known as a Goethe Barometer, this beautifully crafted weather ball is a simple yet surprisingly accurate device for forecasting weather changes. It operates on the scientific principles established by Evangelista Torricelli, the 17th-century inventor of the barometer. German playwright and scientist Johann Wolfgang von Goethe later popularized this elegant design, which has captivated observers for centuries.

How It Works:

The weather ball operates on the basic principle of air pressure. The glass globe is filled with colored distilled water, trapping a pocket of air inside. This internal air pressure remains stable. However, the water in the narrow spout is exposed to the atmosphere.

• When high atmospheric pressure pushes down on the water in the spout, it indicates fair weather is on the way.
• When low atmospheric pressure allows the water in the spout to rise, it suggests that the weather may soon deteriorate, often bringing clouds or rain.

By observing the water level in the spout, you can make your own weather predictions, just as people did centuries ago.

Features:

• Elegant Design: A functional scientific instrument and a beautiful decorative piece for any home, office, or classroom.
• Educational Tool: An excellent hands-on tool for teaching students about air pressure, meteorology, and scientific history.
• Simple & Effective: Indicates changes in air pressure quickly and accurately without the need for batteries or digital parts.
• Easy to Use: Comes with full instructions for setup and reading the results. A syringe and coloring dye are also included for easy filling.

Specifications:

• Height: 7½" (190 mm)
• Ball Diameter: 4" (100 mm)

The Sper Scientific Weather Ball Barometer is a tribute to scientific history and a fascinating way to connect with the natural world.