• A clear circular globe sits atop a wooden base with four black triangular-shaped discs that rotate in the middle.
  • A clear circular globe sits atop a wooden base with four black triangular-shaped discs that rotate in the middle sitting on a desk next to a window,

Solar Radiometer

$ 38.00

Invented in 1873 by chemist & experimenter Sir William Crookes, the solar radiometer was the first way a man could demonstrate light as an energy source.The radiometer consists of an airtight glass bulb containing a partial vacuum. Inside are a...

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