An extraordinary history of humanity's changing vision of the universe. In this masterly synthesis, Arthur Koestler cuts through the sterile distinction between 'sciences' and 'humanities' to bring to life the whole history of cosmology from the Babylonians to Newton. He shows how the tragic split between science and religion arose and how, in particular, the modern world-view replaced the medieval world-view in the scientific revolution of the seventeenth century. He also provides vivid and judicious pen-portraits of a string of great (...) scientists and makes clear the role that political bias and unconscious prejudice played in their creativity. (shrink)

A scientific community cannot practice its trade without some set of received beliefs. These beliefs form the foundation of the "educational initiation that prepares and licenses the student for professional practice". The nature of the "rigorous and rigid" preparation helps ensure that the received beliefs are firmly fixed in the student's mind. Scientists take great pains to defend the assumption that scientists know what the world is like...To this end, "normal science" will often suppress novelties which undermine its foundations. Research (...) is therefore not about discovering the unknown, but rather "a strenuous and devoted attempt to force nature into the conceptual boxes supplied by professional education". (shrink)

Placing Bruno—both advanced philosopher and magician burned at the stake—in the Hermetic tradition, Yates's acclaimed study gives an overview not only of Renaissance humanism but of its interplay—and conflict—with magic and occult practices. "Among those who have explored the intellectual world of the sixteenth century no one in England can rival Miss Yates. Wherever she looks, she illuminates. Now she has looked on Bruno. This brilliant book takes time to digest, but it is an intellectual adventure to read it. Historians (...) of ideas, of religion, and of science will study it. Some of them, after reading it, will have to think again.... For Miss Yates has put Bruno, for the first time, in his tradition, and has shown what that tradition was."—Hugh Trevor-Roper, _New Statesman_ "A decisive contribution to the understanding of Giordano Bruno, this book will probably remove a great number of misrepresentations that still plague the tormented figure of the Nolan prophet."—Giorgio de Santillana, _American Historical Review_ "Yates's book is an important addition to our knowledge of Giordano Bruno. But it is even more important, I think, as a step toward understanding the unity of the sixteenth century."—J. Bronowski, _New York Review of Books_. (shrink)

Thomas S. Kuhn's classic book is now available with a new index.

Traces the development of the integral and the differential calculus and related theories since ancient times.

The first attempted derivation by Galileo of the law relating space and time in free fall that has survived is preserved on an otherwise unidentified sheet bound among his manuscripts preserved at Florence. It is undoubtedly closely associated with a letter from Galileo to Paolo Sarpi, dated 16 October 1604, which somehow found its way into the Seminary of Pisa, where it is still preserved. Those two documents, together with the letter from Sarpi to Galileo which seems to have inspired (...) them, are translated in full below. Sarpi's letter, dated 9 October 1604, suggests that recent oral discussions of problems of motion had recently taken place between the two men. It reads as follows:“In sending you the enclosure, it occurs to me to propose to you a problem to resolve, and another that seems to me paradoxical. (shrink)

The aim of this paper is to report some little-known aspects of sixteenth-century physics as these relate to the development of mechanics in the seventeenth century. The research herein reported grew out of a study on the mechanics of Domingo de Soto, a sixteenth-century Spanish scholastic,1 which has been concerned, in part, with examining critically Pierre Duhem's thesis that the English “Calculatores” of the fourteenth century were a primary source for Galileo's science.2 The conclusion to which this has come, thus (...) far, is that Duhem had important insights into the late medieval preparation for the modern science of mechanics, but that he left out many of the steps. And the steps are important, whether one holds for a continuity theory or a discontinuity theory vis-à-vis the connection between late medieval and early modern science. (shrink)

The most reliable source for a reconstruction of Galileo's progress toward a science of motion is the series of undated fragmentary notes on that subject preserved in Codex A of the Galilean manuscripts at Florence. A gathering of such fragments was published by Favaro in the National Edition of Galileo's works, following the Discorsi. The more sophisticated fragments are clearly associated with the composition of that work, and show a definite and consistent understanding of acceleration. Eliminating those, it will be (...) found that the earlier notes fall into recognizable groups. First, there are some that refer to “moment of gravity”, or to the impetus of a body along a line of descent, and are associated with the discussion of inclined planes in De motu. Second, some refer to descent along arcs and chords of circles, associated with Galileo's letter of 29 November 1602 to Guido Ubaldo. These first two groups of notes do not explicitly refer to accelerated motion, and should not be assumed to do so implicity, where such an assumption can be avoided. (shrink)