The Alzheimer’s Association will offer two free hourlong informational programs on Alzheimer’s disease this summer at the Senior Center. The first presentation, at 10 a.m. Wednesday, is “Know the 10 Signs: Early Detection Matters.” It will focus on the difference between normal aging and symptoms of Alzheimer’s, and cover ways to reduce the risk of developing the disease. The second presentation, “Aging, Memory Loss, and Brain Health,”  is scheduled for 10 a.m. Aug. 8.