77/1949 La théorie du rayonnement et les quanta. Rapports et discussions de la réunion tenue à Bruxelles, du 30 octobre au 3 novembre 1911, sous les auspices de M.E. Solvay. Ed. P. Langevin and M. de Broglie. Paris, Gauthier-Villars, 1912, 1st ed., (8),461,(1)p., orig. wr., large 8vo.

- Contemp. owner's entry on wrapper and htitle. Backstrip sl. dam.

= Very rare first edition of the proceedings of the first international Solvay Conference on physics, devoted to radiation theory and the quanta.