swee'pea99
Squire
You've reminded me (totally OT) that when I were a youngster I were sent off on a potholing week - this would be back at the beginning of the '70s - and we used carbide lights on our helmets. You had to put these crystals in them and add water, and when the gas flame started to die down, you'd find somewhere with water running down the walls and dribble a bit more in, then the flame would perk up again for a bit. Sounds positively medieval now, but of course we didn't think twice about it at the time.