FIRST EDITION OFFPRINT, PRESENTATION COPY, of Bohr's first published scientific paper, written while he was a 20-year-old student at Copenhagen University. Inscribed by Bohr in Danish on front wrapper to Poul Heegaard, mathematician and professor at Copenhagen University. In original wrappers. More about Determination of the Surface-Tension of Water by the Method of Jet Vibration

SECOND EDITION, THE FIRST “COMPLETE” EDITION, of Galileo’s collected works; an important edition containing a wealth of material (nearly all of volume 3) not included in the 1655-56 first collected edition. More about Opere di Galileo Galilei Nobile Fiorentino

FIRST EDITIONS (JOURNAL ISSUES IN ORIGINAL WRAPPERS) OF TWO LANDMARK PAPERS IN THE EARLY HISTORY OF TOPOLOGY, IN WHICH IN WHICH, AMONG OTHER THINGS, MÖBIUS DESCRIBED THE MÖBIUS STRIP, DEFINED THE TOPOLOGICAL CONCEPTS NOW KNOWN AS GENUS AND ORIENTABILITY, AND SHOWED THAT ALL CLOSED ORIENTABLE SURFACES OF A PARTICULAR GENUS..... More about Ueber die Bestimmung des Inhaltes eines Polyëders (1865). WITH: Theorie der elementaren...

RARE FIRST EDITION OF THE FULL EXPRESSION OF PLANCK’S QUANTUM THEORY; THE FOUNDING DOCUMENT THAT REVOLUTIONIZED MODERN PHYSICS. THE HORBLIT COPY. More about "Zur Theorie des Gesetzes der Energieverteilung im Normalspectrum" [On the Theory of...

FIRST COMPLETE, FIRST ILLUSTRATED, AND MOST SOUGHT AFTER EDITION OF THE FIRST MODERN HISTORY OF ART. [The Second Edition overall.] An exceptional copy, very handsomely bound. More about Le vite de’ piu eccellenti pittori, scultori, e architettori [The Lives of the Artists