Lyon Playfair (Chair of Chemistry 1858–69) was entrusted with supervising the studies of Prince Albert and Prince Alfred (Duke of Edinburgh) when they attended the University. Playfair studied chemistry at Anderson's University (University of Strathclyde), and obtained his PhD under Liebig in Giessen 1839. Playfair was introduced to Prince Albert when he acted as interpreter for Liebig, and later became chief adviser for the Great Exhibition of 1851. He was a Member of Parliament for the University from 1868, and – having invented the postcard in 1870 – appointed Postmaster-General in 1873. He fulfilled a long career in public service, becoming Baron Playfair in 1892 and awarded the GCB in 1895.