Braunschweig & Berlin, Germany: Friedr. Vieweg & Sohn/Julius Springer, 1922, 1923, 1924. Hardcover. First Edition. Volume 10: iv, 413 pp. 8vo; Volume 16: iv, 409, [1] pp. 8vo; Volume 21: iv, 382 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.
Alexander Alexandrovich Friedmann (1888-1925) was a Russian mathematician and physicist who built upon Einstein's theory of relativity and further expanded his own theories that the universe has both homogeneous (looks the same from every location) and isotropic (looks the same in every..... 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