Paris: Gauthier-Villars, 1898. Hardcover. First Edition. 1963 pp. 4to. Paper covered boards, brown cloth spine with bold embossed titling, light scuffing overall. Blind embossed library stamp on first free endpaper, clean throughout. Text in French. Very Good.
Marie Curie (1867-1934) proposes that pitchblende contains an element that is more radioactive than either uranium or thorium. In the following year she concluded that the element is radium.