The Department of Chemistry announces this year's Watkins Visiting Professor, Michael Graetzel of Ecole Polytechnique in Lausanne, Switzerland. His public lecture will be presented at 4 p.m. Thursday, Oct. 28, in the Kansas Grand Ballroom at the Wichita Marriott, 9100 Corporate Hills Drive. The title of his talk will be "Molecular Photovoltaics and Mesoscopic Solar Cells."