: Scientific observation is determined by the human sensory system, which generally relies on instruments that serve as mediators between the world and the senses. Instruments came in the shape of Heron's Dioptra, Levi Ben Gerson's Cross-staff, Egnatio Danti's Torqvetto Astronomico, Tycho's Quadrant, Galileo's Geometric Military Compass, or Kepler's Ecliptic Instrument. At the beginning of the seventeenth century, however, it was unclear how an instrument such as the telescope could be employed to acquire new information and expand knowledge about the (...) world. To exploit the telescope as a device for astronomical observations Galileo had to: 1. establish that telescopic images are not optical defects, imperfections in the eye of the observer, or illusions caused by lenses; 2. develop procedures for systematically handling errors that may occur during observation and measurement and methods of processing data. Galileo made it clear that in order to measure and interpret natural phenomena accurately, a suitable method and instrument would need to be developed. It is intriguing, therefore, to regard the Galilean telescope in this light and to discover the linkage established by Galileo among theory, method, and instrument—the telescope. Although the telescope was not invented through science, it is instructive to see how Galileo used optics to employ a theory-laden instrument for bridging the gulf between picture and scientific language, between drawing and reporting physical facts, and between merely sketching the world and actually describing it. (shrink)

Slovenian epistemology is characterised by an idiosyncratic canon, based on three fundamental authors: Gaston Bachelard, Alexandre Koyré, and Thomas Kuhn. What binds this canon together is the attitude that the history of science should be viewed as a history of radical breaks or revolutions in scientific thought. The drawback of such an anthology of authors is not only that it is outdated, but that, from the position of this canon, it is difficult to discern the problems stemming from the approach (...) to history of science it endorses. In order to highlight the blind spots of Slovenian epistemology, I examine a different interpretative trajectory of the notion of scientific revolution in the United Kingdom and the United States. The methodological program, which focuses on revolutionary breakthroughs in scientific ideas, is thus re-evaluated by considering its strategic role in the institutionalisation of the history of science as a discipline. The event that marked the translation of French epistemology into English history of science were the lectures of the delegates from the Soviet Union at the Second International Congress of the History of Science and Technology in 1931. In post-war Anglo-American history of science, the concept of scientific revolution was adopted as a means of excluding Marxist studies of science – which had spread under the influence of the Soviet delegation – from the realm of acceptable discourse. I demonstrate how the Cold War historiography of science introduced a divide between the “internal” and “external” factors of scientific development, and their supposed synthesis in the work of Thomas Kuhn. Finally, I review the critiques that the sociology of scientific knowledge levelled at the story of the Scientific Revolution and point out the importance of these controversies for current epistemological research. (shrink)