[Berlin, Stockholm, Paris, F. & G. Beijer, 1897]. 4to. Without wrappers as extracted from "Acta Mathematica. Hrdg. von G. Mittag-Leffler.", Bd. 21. No backstrip. Fine and clean. Pp. 331-341.
First printing of Poincaré's principal address at the first International Congress of Mathematicians held in Zürich in 1897.
Order-nr.: 46182