Round sounds emanate from within Harkness Tower’s sharp Gothic Revival facade tonight between 7 and 8 p.m. Inside that tower is a carillon comprised of 53 bells—43 tons’ worth—connected to a “console that resembles a simple organ, with batons and pedals” for ringing them. This is the fourth weekly show in a series of eight put on by the student-run Yale University Guild of Carillonneurs during its annual summer concert series. A different carillonneur plays the massive instrument each time; tonight the honor belongs to Michael Solotke. The public is invited to lounge upon the grassy courtyard of Branford College (74 High St, New Haven)—lawn chairs and/or picnicking encouraged. Free.