Transcription: Next, I persuaded a mammoth to stand on the pipe, keeping it closed. Like all of its kind, the mammoth was singularly adept at sleeping for long periods, during which time the villagers had to wait for their water. My breakthrough came when I replaced the mammoth with a simple screw clamp. I soon refined the idea using a system of pipes and washers. My invention had an additional advantage. Its constant dripping was one of the few sounds that can keep a mammoth awake.
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