MM> Psychometrics concerns itself with the
 MM> philosophy, construction, administration and
 MM> deployment of measures of behaviour - off the
 MM> top of the head; formal descriptions ebb and
 MM> flow with the latest rash of buzzwords...

There's a chart (actually a graph) that one can use to look up the relative
humidity as a function of the wet and dry bulb temperatures.  For some
reason they call it a psychometric chart.  The device used to measure the
wet and dry bulb temperatures is a psychrometer.  What's the connection?

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