Frederick the Great | Frederick | Frederick II | The Andy Griffith Show | Frederick II, Holy Roman Emperor | Griffith University | Frederick Russell Burnham | Frederick Roberts, 1st Earl Roberts | Frederick Law Olmsted | Nanci Griffith | Frederick I, Holy Roman Emperor | Frederick Forsyth | Frederick Douglass | Frederick, Maryland | Melanie Griffith | Prince Frederick, Duke of York and Albany | Andy Griffith | Frederick III | Frederick I | Frederick Delius | D. W. Griffith | Frederick William III of Prussia | John Frederick II, Duke of Saxony | Frederick III, German Emperor | Frederick William IV of Prussia | Frederick Schomberg, 1st Duke of Schomberg | Frederick I, Margrave of Brandenburg-Ansbach | Frederick III, Holy Roman Emperor | Frederick, Prince of Wales | Queensland Conservatorium Griffith University |
Fred Neufeld, a German bacteriologist, had discovered the pneumococcal types and serological typing; until Frederick Griffith's studies bacteriologists believed that the types were fixed and unchangeable from one generation to the next.