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

FIRST EDITION OF THE FIRST TEXTBOOK OF PHYSIOLOGY. More about De Homine

AN IMPORTANT SIGNED LETTER (in English) by Einstein, revealing his reservations of associating with communism even in the fight against fascism. More about Typed Letter Signed

FIRST PRINTING OF BENJAMIN FRANKLIN'S ACCOUNT HIS KITE EXPERIMENT, ONE OF THE MOST FAMOUS SCIENTIFIC EXPERIMENTS IN AMERICAN HISTORY. WITH AN EARLIER PAPER DISCUSSING HIS THEORIES OF THE NATURE OF LIGHTNING. More about A Letter of Benjamin Franklin, Esq: to Mr. Peter Collinson, F.R.S. concerning an electrical Kite....

FIRST EDITION IN ORIGINAL WRAPPERS of the account of Millikan’s famous experiment, later known as the ‘oil-drop experiment’, in which he first provided the definitive proof that all electrical charges are exact multiples of a definite, fundamental value—the charge of the electron. More about A New Modification of the Cloud Method of Determining the Elementary Electrical Charge and the...