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Solar Engine Radiometer
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Solar Engine Radiometer
No electricity! No batteries! No power except light!

The brighter the light, the faster it turns. Runs up to 3000 rpm. Used in science classes for experiments. Partial vacuum in glass globe where 4 vanes spin on needlepoint bearing. Spins continuously from sun or light bulb.

No fuel, no lubrication, no repairs.
Item
Product
Qty
Price
4926
Solar Engine Radiometer
$10.00