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Make the palindrome of the following letters: D, D, D, D, E, E, I, I, I, I, N, N, O, O, R, R, T, T, V
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MUSIC: Which is the musician band from the picture?

Samuel Hall

Died 21 Nov 1863 (born 1781).English engineer who invented the surface condenser for steam boilers (patented 1834), an important milestone of its era, because it possible to recirculate fresh water instead of using corrosive salt water in the boilers of ocean-going steam ships. Steam passed through a number of small condensing tubes cooled on the outside surfaces by the circulation of cold sea water around them. By keeping the boilers free of salt, a considerable saving of fuel was realized, and repair expenses were reduced. Initial trials were unsuccessful until improved by a patent by Spencer who inserted an indiarubber ring around each end of the tube to keep them properly water tight. Hall held more than 20 patents, mostly relating to steam engines and boilers.

Pretty normal

A woman went to see her psychiatrist. "I'm really concerned," she said. "The other day I found my daughter and the little boy next door together, naked, examining each other's bodies and giggling."

The psychiatrist smiled. "That's nothing to worry about, it's pretty normal."

"Well, I don't know," said the woman, "It worries me. It worries my daughter's husband too."

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