Crookes radiometer

1873 Crookes radiometer

The book of science

Tom Sharp

William Crookes fluid dynamics

Crookes radiometer

Crookes paddlewheel

Chinatown radiometers

The correct explanation for Crookes’ rotating vanes is thermal transpiration, as first proposed by Osborne Reynolds, but more on fluid dynamics later.

See also in The book of science:

Readings on wikipedia: