[1] : The Collaborative International Dictionary of English v.0.48

gauger \gau"ger\, n.
   one who gauges; an officer whose business it is to ascertain
   the contents of casks.
   1913 webster

[2] : Bouvier's Law Dictionary, Revised 6th Ed (1856)

gauger. an officer appointed to examine all tuns, pipes, hogsheads, barrels, 
and tierces of wine, oil, and other liquids, and to give them a mark of 
allowance, as containing lawful measure. 

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Gauger, definition of term: Gauger
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