WORKING VOLUNTEER Jerry Kohl, a volunteer at the Lester F. Larsen Tractor Test and Power Museum, works on a John Deere D manufactured in 1929. Kohl, who gives tours at the museum, also helps maintain tractors in the collection. The East Campus musuem is free and open to the public; 9 a.m. to 4 p.m. (closed from noon to 1 p.m.) Tuesdays to Fridays, and 10 a.m. to 2 p.m. Saturdays. Photo by Troy Fedderson/University Communications.