early research in the department was undertaken in Germany. Early research in the 1900s was concerned with electrical conductivity and quantum theory, later moving into thermal conductivity and acoustics. In 1931, the department hosted the Faraday Centenary Exhibition. E. J. Williams was appointed to the Chair of Physics in 1938 where he continued his research into sub-atomic particles using a cloud chamber. Following the Second World War, research was concerned with mechanical and nuclear physics, later moving into the fields of air density, experimental rocket launching equipment and radar. Department of Psychology In 2007, Aberystwyth established psychology as a "Centre for Applied Psychology" within the Department of International Politics. By 2011, psychology had moved into its current premises in Penbryn 5 on the Penglais Campus. The department has over 300 undergraduate students, with degrees accredited by the British Psychological Society. Campuses Penglais The main campus of the university is situated on Penglais Hill, overlooking the town of Aberystwyth and Cardigan Bay, and comprises most of the university buildings, Arts Centre, Students' Union, and many of the student residences. Just below Penglais Campus is the National Library of Wales, one of Britain's five legal deposit libraries. The landscaping of the Penglais Campus is historically significant and is listed at Grade II* on the Cadw/ICOMOS Register of Parks and Gardens of Special Historic Interest in Wales. The CADW listing states, Llanbadarn The Llanbadarn Centre is located approximately one mile to the east of the Penglais Campus, near Llanbadarn Fawr, overlooking the town and Cardigan Bay to the west, with the backdrop of the Cambrian Mountains to the east. Llanbadarn Centre hosted Aberystwyth Law School and Aberystwyth Business School, which together formed the Institute of Business and Law. The Department of Information Studies is also based there. Additionally, the Llanbadarn Campus is the site of the Aberystwyth branch of Coleg Ceredigion (a further education college, and not part of the university). Goggerddan At Gogerddan, on the outskirts of town is located the university's major centre for research in land based sciences and the main centre for the Institute of Biological, Environmental and Rural Science. School of Art, Edward Davies Building The School of Art is located between the Penglais Campus and the centre of Aberystwyth, in what was originally the Edward Davies Chemical Laboratory. A listed building, the Edward Davies Building is one of the finest examples of architecture in Aberystwyth. Old College