Braunschweig & Berlin, Germany: Friedr. Vieweg & Sohn/Julius Springer, 1921-1922. Hardcover. First Edition. Volume 7: vi, 414 pp. 8vo; Volume 8: iv, 419 pp. 8vo; Volume 9: iv, 412 pp, 8vo. Each volume is ex-library with brown patterned paper boards, lighter brown cloth spines and corner tips; gold embossed titling to spine. Library stamps within, including stamps on title page of each volume, very clean with card pocket remaining on the rear pastedown of each volume. All text in German. Very Good.
The Stern-Gerlach Experiment, conducted by Otto Stern (1888-1969) and Walter Gerlach (1889-1979) at the University of Frankfurt in 1922 was the first experiment to demonstrate the basic principles of quantum mechanics (physical phenomena at the atomic scale) and even went so far as to demonstrate that measurement at that level effects the measurement. This three volume set includes the following important early articles: “Ein Weg zur experimentellen Prüfung der Richtungsquantelung im Magnetfeld” by Otto Stern ( Zeitschrift für Physik 7, 249-253, 1921) describes the design. “Der experimentelle Nachweis des magnetischen Moments des Silberatoms” by Walther Gerlach and Otto Stern (Zeitschrift für Physik 8 p. 110-111, 1921) disseminates the results. “Der experimentelle Nachweis des magnetischen Moments des Silberatoms” & “Das magnetische Moment des Silberatoms” by Walther Gerlach and Otto Stern (Zeitschrift für Physik 9 pp. 349-355, 1922) describes the results in greater detail.