Visitor Center open from 1 pm to 4 pm. Tour the house on your own and visit with costumed docents in each room. Chemistry demonstrations by Dr. Priestley at 1:30 and 2:30 pm. Free admission.Joseph Priestley House and laboratory is an historic site that preserves and interprets the contributions and significance to American history of Joseph Priestley. As a National Historic Landmark and National Historic Chemical Landmark, the site features Priestley's manor house with its laboratory. In the nearby Pond Building can be found the Joseph Priestley Timeline, a series of panels that present accomplishments during different periods of his life.