Berlin, Germany: Julius Springer, 1925. Three Quarter Cloth. First Edition. Vol. 33: vi, 950 pp. 8vo. Three quarter cloth binding with red cloth corners and spine, pattern paper inset front and read, leather gold embossed label at spine. Some scuffing overall with a clean interior. Ex-library with the occasional library stamp. Vol. 34: vii. 953 pp. 8vo. Text in German. Three quarter cloth binding with black cloth corners and spine, pattern paper inset front and read, gold embossed titling on spine. Some scuffing overall, front hinges at spine beginning to fray, a clean interior. Also ex-library with the occasional library stamp.
Heisenberg’s quantum mechanics consisted of a set of tables containing pairs of Fourier terms describing the transition of electrons from one state to another..... More

Berlin, Germany: Julius Springer, 1927. Hardcover. First Edition. viii, 917 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.
"Zur Deutung der Molekelspektren" by Friedrich Hund (pp. 93 - 120) is his third paper on Molecular Orbital Theory. Very Good. More

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.
“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..... More

Darmstadt, Germany: Wissenschaftliche Buchgesellschaft, 1959. Hardcover. First Edition. First Wissenschaftliche Buchgesellschaft Edition, reprinting Riemann's 24, [2] Index pp. 12mo. Light terracotta cloth coverd boards with gold titling to spine. Clean, crisp copy with previous owner's signature in ink on first free endpaper. Text in German.
Translates to "On The Hypothesis Which Underlies Geometry" and originally delivered by Riemann in 1854. Riemann's work on "Riemann Geometry" was later used by Albert Einstein in the development of his theories. Fine. More