I hadn't seen the tap either

, and agree a whisky dispenser......... Brian Brooks very useful booklet on whisky dispensers and measures gives much information on such things, and he confirms Peter's spelling variation depending on whether Scottish or Irish/American spirit, although oddly enough on the front cover he shows a barrel shaped dispenser with gilt engraving 'SCOTCH WHISKEY'.
Apparently such dispensers weren't for whisky only - brandy, rum, sherry and bitters could equally be used (but presumably not if the engraving was for Scotch.
Brooks booklet appears to concentrate on U.K. examples only, so can't comment on States items unfortunately, and shows many barrel shaped dispensers which include taps.
The shape of the example in this post looks to be referred to as an urn - again all with taps - many of them with cut decoration plus advertising in the form of the distillery name on some, and this shape looks to be fairly common.
It's possible that urns held less capacity than barrels - somewhere between 2 and 3 gallons was not unusual, and some of the barrels are quoted as containing 4 gallons.
Date wise 1870 - 1930 - and in view of the fact that Brooks confirms that Irish and American spirit is spelled with an 'e', then there is some reason for believing this one is Scottish.
Ref. 'Whisky Dispensers & Measures' - Brian Brooks - 2000.