FIRST EDITION, OFFPRINT, of Bohr's 1915 paper identifying conclusive experimental evidence for his model of the atom. More about On the Quantum Theory of Radiation and the Structure of the Atom

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

ON THE ROAD TO RELATIVITY: A four-panel working bifolium from Einstein's early post-Minkowski tensor phase. More about Autograph scientific manuscript

FIRST EDITION in original wrappers of Lee and Yang's groundbreaking proposal to determine the nature of parity in weak interactions; essential to the modern understanding of elementary particles. More about Question of Parity Conservation in Weak Interactions

ONE OF THE FIRST TRANSLATIONS OF ØRSTED’S FAMOUS AND UNOBTAINABLE LATIN PAMPHLET ON THE DISCOVERY OF ELECTROMAGNETISM, PUBLISHED IN THE FOLLOWING MONTH IN FRANCE, AND IMPORTANT FOR ITS CONNECTION TO AMPÈRE’S EXTENSIONS OF ØRSTED’S RESEARCH ON ELECTROMAGNETIC PHENOMENA. A MAGNIFICENT COPY IN ORIGINAL WRAPPERS. More about Experimenta circa Effectum, etc. Expériences sur l’effet du conflict électrique sur...