Eddington, Arthur Stanley. Science and the unseen world / By Arthur Stanley Eddington. - London : George Allen & Unwin, 1929 [impression 1949]. - 56 p. ; 14 cm. - Swarthmore lectures, 1929. . - Swarthmore lectures, 1929. . Subjects--Topical Terms: Society of Friends.Religion and science . Dewey Class. No.: 289.6 / EDS 1949