6006378 Sir William Bragg gives a scientific demonstration to an appreciative audience (b/w photo) by English Photographer, (20th century); Private Collection; (add.info.: Sir William Bragg gives a scientific demonstration to an appreciative audience. Illustration for Master Minds of Modern Science by T C Bridges and H Hessell Tiltman (new edn, Harrap, 1934). Photo credit: none.); by Look and Learn; English, out of copyright.