Congratulations on reaching two dizzying pinnacles Bingley!

stales

PS - Thanx for the link to the Smithsonian article. The comment that those guys appear to be suffering no ill effects despite ten years working in the crater seems far fetched. Without proper filtration equipment the SO2 vapours they inhale will condense as sulfuric acid in their trachea and lungs. Having been exposed to only a couple of whiffs of sulfur dioxide from the old smelter at Kalgoorlie I can say first hand it's an unpleasant, let alone highly dangerous pastime. Asthmatics are particularly susceptible - likely to have a major attack within seconds.