OleDawg said: (quoted from post at 20:51:06 07/17/09) Of course you guy's are right, but when Fahrenheit developed his temperature scale he used the freezing point on salt water as his 0 point. It must have been US salt water as your the only ones to still use that scale.
Well, not really again.
http://en.wikipedia.org/wiki/Fahrenheit
He based zero on a ammonium chloride brine, which is a "salt" but not sea water. I guess the brine was used since it stabilizes at a certain temperature which turned out to be 0F.
Sea water will freeze above zero. The fact that it usually doesn't has more to do with tides and the chop that prevents ice from forming.
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