Funny thing, this differing scales of temperature malarkey. Last night, in the quiz - one of the questions was "At what temperature do both Centigrade and Fahrenheit read the same?" Could I get my head around that? Could I b*ggery.
Gusset - I'm SO pleased you like my name for you. I'm equally gratified that you haven't transposed the two words :-)
I know I have mentioned this before on one of these sites, but I was in Finland just over a year ago, and the first ten minutes of the Finnish evening news was all about how cold it was. They were interviewing people from Siberia who were complaining about the cold. I remember calculating at the time that we were down in the range where it didn't make much difference whether we were talking F or C. (It was down to at least -31C.)