THE FIRST PUBLISHED DESCRIPTION BY BABBAGE OF HIS ANALYTICAL ENGINE, THE FIRST GENERAL PURPOSE COMPUTER. AN EXTRAORDINARY COPY: FIRST EDITION, INSCRIBED BY BABBAGE TO EMPRESS EUGENIE AND IN A MAGNIFICENT ROYAL PRESENTATION BINDING. More

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

FIRST EDITION IN ORIGINAL WRAPPERS of one of the seminal discoveries of the twentieth-century: the invention of the “Fleming Valve”, or vacuum tube, often cited as the beginning of the field of electronics. PMM 396. More

THE FIRST COMPLETE COLLECTION OF THE 165 LETTERS OF ANTONI VAN LEEUWENHOEK THAT WERE PUBLISHED IN HIS LIFETIME (IN THE ORIGINAL DUTCH, AND PRECEDING THE FIRST COMPLETE LATIN EDITION BY FOUR YEARS); INCLUDING HIS LETTERS TO THE ROYAL SOCIETY DESCRIBING THE FIRST-EVER OBSERVATIONS OF BACTERIA, SPERM CELLS, AND OTHER MICROSCOPIC..... More

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

First complete edition of Rontgen’s announcement of the discovery of the X-Ray. More