Berlin, Germany: Julius Springer, 1926. Hardcover. First Edition. vii, 951 pp, 8vo. 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.
“Über dass Wasserstoffspektrum vom Standpunkt der neuen Quantenmechanik” by Wolfgang Pauli (pp. 336-363) in which Pauli outlines his theory of the hydrogen spectrum which contributed to the study of quantum mechanics; “Zur Deutung einiger Erscheinungen in den Molekelspektren” by Freidrich Hund (pp. 657-674) is his early paper on Molecular Orbital Theory; “Zur Quantelung des Idealen Einatomigen Gases” by Enrico Fermi (pp. 902-912) outlines what became known as Fermi-Dirac statistics.