Feb. 17 Chemistry and biochemistry, Thomas V. O'Halloran, Northwestern University, 4 p.m., Jones Physical Sciences Center, Room 006. Refreshments at 3:45 p.m.

Feb. 23 Physics and astronomy, Christopher Gordon, University of Chicago, 4 p.m., Jones Physical Sciences Center, Room 409. Refreshments at 3:45 p.m.

Feb. 23 School of Law, Charles W. Knowlton Lecture, "Radical Evil in the Lockean State: The Neglect of the Political Emotions," Martha Nussbaum, University of Chicago School of Law, 5 p.m., USC School of Law auditorium.

Feb. 24 Chemistry and biochemistry, James Wuest, Universite de Montreal, 4 p.m., Jones Physical Sciences Center, Room 006. Refreshments at 3:45 p.m.

Feb. 24 School of the Environment, "Ten Steps to Stronger Documents," Verna Hankins, technical publications editor, Lockheed Martin Aeronautics, Marietta, Georgia, 11 a.m., Byrnes Building, Room 704.

Feb. 27 Walker Institute, "War Displacement, and Issues of Resettlement in Acholi, Northern Uganda," Ron Atkinson, professor of history at USC, 3 p.m., location TBA.

Feb. 27 Biological sciences, Paul Greenwood, Colby College, 4 p.m., Coker Life Sciences, Room 005.

March 2 Physics and astronomy, Joseph Johnson, professor of physics at USC, 4 p.m., Jones Physical Sciences Center, Room 409. Refreshments at 3:45 p.m.

March 3 Chemistry and biochemistry, S. Thayumanavan, University of Massachusetts, 4 p.m., Jones Physical Sciences Center, Room 006. Refreshments at 3:45 p.m.

2/06