I know a guy that owned a slaughterhouse 30+ years ago and he had a satellite dish covered in mirrors with a copper ball at the focal point. He used
it to heat water to run the operation. He told me that it worked great when it tracked the sun the way it was supposed to. Back then they were just
learning to do these things. I remember going by it and seeing the ball glowing white hot. I believe it would have run a small steam engine.
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