The Hummelstown Area Historical Society will hold its next meeting on Monday, May 19th at the Parish House Museum on Rosanna Street and Long Alley. The business meeting will start at 7:00p.m. followed by a program featuring guest speaker Professor Kreiger; a Geologist who will speak on the Brownstone Industry. The program will start at 7:30p.m. and as always the meeting and program are free and open to the public.