The Light Mill
The light mill, consists of an airtight glass bulb, containing a partial vacuum. Inside are a set of vanes which are mounted on a spindle. The vanes rotate when exposed to light, with faster rotation for more intense light, providing a quantitative measurement of electromagnetic radiation intensity.
Handblown in Glass
Available in 2 Sizes.
Small: 7cm diameter. 14 x 7 x 7cm
Large: 10cm diameter. 18 x 10 x 10cm
Presented in a natural cardboard box.