Interesting story behind the first MSR stove, as told to me by Penberthy himself. It seems that he was on top of Rainier with a friend when the friend developed altitude sickness that turned into pulmonary edema. The friend died & Larry became somewhat obsessed with finding a way to avoid altitude sickness.
He decided that dehydration was the major problem and that climbers became dehydrated because carrying enough water to stay hydrated was way too heavy, but the stoves of the time were too slow to melt enough snow to keep a team in water. He designed the original stove to be a quick snow melting machine, not a camp cook-stove, although many of us used it for both.
In 1978 I climbed Rainier as part of a group that he put together to test his theory of the cause of altitude sickness. By that time he had decided that the problem was a combination of dehydration, acid buildup in the blood, and loss of electrolytes. So we all drank lots of water, peed on litmus paper & ate Rolaids to keep our urine alkaline, and popped salt tablets.
One of the other climbers was a Doctor and he confided to me that he thought Larry was right about the dehydration, but full of it regarding the other stuff. All I know for sure is that I made the summit feeling better at 14,411 feet than I had on St. Helens at 9,677 feet. These days it's widely accepted that a climber needs to stay well hydrated & replace lost electrolytes.
Penberthy was a little different, as others have noted. It's a good thing there have been and are people like him though. If not we wouldn't be posting opinions on web pages; we wouldn't even be using fire or the wheel.