Michael Harrison’s painting ventures an unfashionable mode of generalization, in which archetypes risk dismissal as stereotypes, deep truths as clichés. This tension is given force by the unusually restricted focus of the artist’s investigation, which has confined itself for three decades to the medium of dilute acrylic, mostly on paper (one work here was on canvas). Of the pieces in this exhibition, “Sun Square Saturn,” all completed in 2009, two were started in the past few years, four others have been in the works since between 1996 and 1998, and three are dated starting 1989. One of the