Cardwell Hall was completed in 1963. Several unusual facilities are available in this building which include the James R. McDonald Laboratory, which houses a Tandem van de Graff accelerator, and atomic superconducting linear accelerator and an EBIS source of highly ionized atoms, together with equipment for studying atomic collisions. A fully equipped planetarium permits students to view the location and movement of celestial bodies during various seasons. An astronomical observatory is located on the roof. This facility was named in honor of Dr. A.B. Cardwell who came to K-State in 1936 to become the Head of the Department of Physics.