Photograph of a man adjusting a burner under a beaker, [s.d.]. A man stands at left and is handling a thermometer placed in a glass beaker at right. The beaker rests on a ring stand over a Bunsen burner. The man is adjusting a rubber hose attached to the base of the burner. The man is wearing a dark vest, matching slacks, a light-colored striped shirt and a spotted tie. He is mostly bald, with dark hair around the side of his head. In the background, several unidentified bottles rest on wooden shelves in front of a brick wall.