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 RARE ORIGINAL WRAPPERS of the presentation of de Broglie’s highly influential “pilot-wave” interpretation of quantum mechanics. More about La mécanique ondulatoire et la structure atomique de la matière et du rayonnement [Wave...

FIRST EDITION IN ORIGINAL WRAPPERS of Davisson and Germer’s confirmation of de Broglie’s hypothesis that matter has wave-like properties. More about Diffraction of Electrons by a Crystal of Nickel

FIRST EDITION IN ORIGINAL WRAPPERS of Dirac’s first major paper; a major achievement in the advancement of the new quantum theory. More about The Fundamental Equations of Quantum Mechanics

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, COMMERCIAL OFFPRINT ISSUE, of Einstein's important 1914 paper on the development of general relativity. More about Die formale Grundlage der allgemeinen Relativitätstheorie. [The Formal Foundation of the General...

FIRST PRINTING IN ORIGINAL WRAPPERS OF ONE OF EINSTEIN'S MAJOR WORKS: HIS FIRST PAPER ON THE DERIVATION OF PLANK'S LAW AND PROVIDING THE THEORETICAL BASIS FOR THE LASER. More about Strahlungs-Emission und -Absorption nach der Quantentheorie [Emission and Absorption of Radiation...

THE BIRTH OF GENERAL RELATIVITY: FIRST PRINTING IN RARE ORIGINAL WRAPPERS OF ONE ONE EINSTEIN’S MOST IMPORTANT PAPERS; containing the beginning of general relativity, the derivations of the equivalence principle, gravitational redshift, and the gravitational bending of light. More about Über das Relativitätsprinzip und die aus demselben gezogenen Folgerungen [On the Relativity...

RARE FIRST EDITION IN ORIGINAL WRAPPERS OF THE REPORTS FROM THE HISTORIC FIRST SOLVAY CONFERENCE, “THE FIRST INTERNATIONAL CONFERENCE IN PHYSICS EVER ORGANIZED” AND A CRITICAL MOMENT IN THE BIRTH OF QUANTUM PHYSICS. More about La Theorie du Rayonnement et les Quanta. Rapports et Discussions de la Reunion Tenue a Bruxelles...

EXTREMELY RARE COMPLETE SUITE OF SEVEN LARGE SILVER PRINTS FROM EINSTEIN’S FAMOUS PHOTO SHOOT AT PRINCETON WITH ROMAN VISHNIAC. Each print is signed by Vishniac and dated “At Princeton 1942” in his hand below the image and numbered on the back. More about Einstein at Work [Suite of Seven Photographs

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