FIRST PRINTINGS OF THE FOUNDATIONAL PAPERS ON THE BIG BANG AND THE ORIGIN OF THE UNIVERSE. Including a fine copy of the famous “Alpha-Beta-Gamma” paper. More about The Origin of Chemical Elements. WITH: Expanding Universe and the Origin of Elements. WITH:...

FIRST EDITION, OFFPRINT ISSUE, INSCRIBED BY NIELS BOHR, of Bohr's Nobel Prize lecture, delivered on the occasion of Bohr's acceptance of the 1922 Nobel Prize in Physics. An association copy: Inscribed to J.A. Christiansen, noted scientist and student of Bohr. More about Om Atomernes Bygning [On the Structure of Atoms

IMPORTANT PAPERS BY NIELS BOHR CONCERNING HIS DEBATES WITH ALBERT EINSTEIN OVER FOUNDATIONAL ISSUES IN QUANTUM MECHANICS. More about Letter to the Editor of Nature (13 July, 1935); “Can the Quantum Mechanical Description of...

FIRST EDITIONS of two critical papers in developing our understanding of the atom: 1) all three parts of Bohr’s landmark work marking the definitive break from using classical physics at the atomic level, often cited as the foundation of our modern understanding of the atom; 2) both parts of Moseley's..... More about On the Constitution of Atoms and Molecules (Bohr). WITH: The High-Frequency Spectra of the...

FIRST EDITION IN ORIGINAL WRAPPERS OF BORN’S NEW MATHEMATICAL DESCRIPTION OF QUANTUM PHYSICS, INCLUDING THE FIRST USE OF THE TERM "QUANTUM MECHANICS." More about Über Quantenmechanik [On Quantum Mechanics

FIRST EDITION IN ORIGINAL WRAPPERS of Compton’s report providing the data and experimental evidence for the dual wave-particle nature of electromagnetic radiation, later called “the Compton effect”. More about Secondary Radiations Produced by X-Rays

FIRST EDITION IN ORIGINAL WRAPPERS of Debye’s explanation of the dual wave-particle nature of electromagnetic radiation (the “Compton effect”). Precedes the full account by Compton. More about Zerstreuung von Röntgenstrahlen und Quantentheorie

OVER 100 PHOTOGRAPHS (with some duplicates) from the archives of the Wide World Photos (later the Associated Press) documenting Einstein’s life. Taken together, the collection – photographs with individual explanatory captions – serves as a biography in pictures through the eyes of the press and is a valuable primary source..... More about Archive of Photographs

FIRST EDITION IN ORIGINAL WRAPPERS of one of Einstein's major papers on the modification of general relativity and the beginning of his unified field theory. More about Spielen Gravitationsfelder im Aufbau der materiellen Elementarteilchen eine wesentliche Rolle?...

FIRST EDITION, FIRST PRINTING, IN ORIGINAL WRAPPERS of Einstein’s paper outlining a thought experiment to suggest that the uncertainty principle requires the acknowledgement of an indeterminate past. More about Knowledge of Past and Future in Quantum Mechanics

FIRST EDITION of Feynman’s undergraduate thesis at MIT, “a fundamental discovery” published in The Physical Review when he was just twenty-one. More about Forces in Molecules

EXTREMELY RARE OFFPRINTS OF FEYNMAN’S FINAL TWO PAPERS ON QUANTUM ELECTRODYNAMICS, DESCRIBING THE MATHEMATICAL FOUNDATIONS FOR HIS PATH-INTEGRALS AND FEYNMAN DIAGRAMS. More about Mathematical Formulation of the Quantum Theory of Electromagnetic Interaction. WITH: An Operator...

FEYNMAN GIVES ADVICE TO LECTURE SERIES COMMITTEE CHAIR OFFERING REVEALING AND QUINTESSENTIALLY FEYNMAN ADVICE: "A good man interested in his work, and not a quack trying to sound important is what you need." More about Typed Letter Signed [TLS