The Historical Society of Olde Northfield announces that the Palmer House Museum will be open for visitors from 2 to 4 p.m. on June 25, July 9 and 23, and Aug. 13 and 27. Society members will be available to discuss area history and artifacts on display at one of the area's first frame homes, located next to Northfield Elementary School at 9390 Olde Eight Road in Northfield Center.