I really should be working right now,
but I just thought I'd share the dream I had the other night, where I turned up to play a gig and realised I'd left my bass guitar at home! The rest of the band looked at me like the retard I had clearly managed to be, until I had a flash of inspiration:
"Don't worry, fellers," I said, "find me a suitably shaped plank of wood, and I'll fashion a guitar body out of these shards of mango."
And I did. Or at least, I seem to remember trying to form a guitar body out of pieces of dried mango, and then I woke up feeling very confused and more than a little relieved.

Edit: And to answer the main question - all of yesterday and, thus far, today, the change from relative humidity to volume mixing ratio.

IRRITATING AND WRONG GRAPH IS WRONG AND IRRITATING.
(LongJohnBaldry, Thu 15 Jul 2010, 8:34, Reply)