An illustration of an hydrometric savant.

Imagine, for a minute, your stereotype of a person of learning; especially one with detailed knowledge in some specialized field of science. I expect the person filling your mind’s eye is not a ruddy-faced bloke with a substantial belly and a thick Queenslander accent wearing shorts and R.M.Williams boots. Appearances are deceiving. I first met Ray ‘Rainman’ Maynard in Nelson, New Zealand....

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