Water-wheel
and pump
A type of one
of the many forms of perpetual-motion devices that have been exploited
during the past three centuries, and perhaps earlier, in which a water
wheel is made to pump the water to drive it.
(Subsection 941, from
p.377)
From: Gardner D. Hiscox, M.E., Mechanical Appliances and Novelties of Construction (1927), Norman W. Henley Publ. Co.
In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
