3 pages, in French, 8o, single folded sheet, with envelope. English translation included." /> WAALS, Johannes Diderik van der (1837-1923). Autograph letter signed ("JD van der Waals") to Henri Becquerel (1852-1908). Amsterdam 22 June 1898. <I>3 pages, in French, 8<V>o, single folded sheet, with envelope.</I> English translation included. | Christie's