Group of eleven items signed by winners of the Nobel Prize in Chemistry, ranging in size from 2 x 3 to 8.5 x 11, including: Glenn Seaborg (SP and commemorative cover), Linus Pauling (SP and philatelic souvenir), Melvin Calvin (SP), Herbert C. Brown (SP), Christian B. Anfinsen (SP), Gerhard Herzberg (SP), Paul Flory (SP), Herbert Hauptman (SP), and Roger D. Kornberg (SP). In overall very good to fine condition, with some staining to the Seaborg cover.