ST85 Solar Radiometer – History & Instructions

History:

Also known as a light mill or solar engine, the Solar Radiometer demonstrates how light can be transformed into motion. Invented in 1873 by physicist Sir William Crookes, it contains black and polished vanes suspended inside a sealed glass bulb. When exposed to sunlight or a warm lamp, the vanes spin as the dark surfaces absorb heat more quickly, creating motion inside the low-pressure air.

Instructions:

MOTION IS DRIVEN BY HEAT.

In order for it function properly, expose the radiometer to a spot light, or better yet natural light. Your radiometer will not work with fluorescent light.

Most importantly, enjoy your radiometer.

Product Note:

Radiometers are hand made and will vary slightly in size and color. The black used on the vanes can sometimes flake off. These flakes are usually very small. This is not a defect, but a result of the hand made nature of this product.

WARNING: THIS PRODUCT IS MADE OF FRAGILE MATERIALS.

THIS PRODUCT IS MADE OF FRAGILE MATERIALS. Inspect the Solar Radiometer for any damage to the glass which may have occurred during shipment. Damage can be seen as cracks or chips in the glass. Do not use the product if damage is detected.

If the product is broken, handle with care and avoid direct contact with broken glass pieces to prevent injury.