By: Addison Wylie Ok, everyone.  This way, please.  This tour is running behind, and we need to catch up. This next work we’ll be observing is Frederick Wiseman’s National Gallery.  This work has been known to carelessly eat up time for those who endure it.  The entire canvas – for some reason – takes close to three hours to view.  And, even though we’re given too much time to comprehend this lacklustre endeavour, on-lookers will…