In the 1880s, there had existed a series of controversies between the proponents of open and closed transformers. James Swinburne reopened it in 1889 when he designed a new type of open ‘Hedgehog’ transformer, and argued that it had the highest all-day efficiency. Three years later, John Ambrose Fleming showed that the Hedgehog was not the best but rather close to the worst. The bitter controversy between Swinburne and Fleming ended quickly, as Fleming made the unstable AC power measurement stable (...) by creating agreement concerning the calibration of AC instruments with the help of Kelvin's authority. Instruments, measurement, and calibration were intimately bound up with hegemonic issues in late-Victorian electrical engineering. (shrink)

This paper aims to reconstruct the history of the first transatlantic wireless telegraphy on the basis of J. A. Fleming's unpublished notebooks and other manuscript sources. It will be shown that the progress of the experiment, in which power engineering was first combined with wireless telegraphy, was neither smooth nor automatic, and various kinds of difficulties or ‘resistances’ that Fleming and Marconi encountered during the course of the experiments in the laboratory and in the field at Poldhu will be emphasized. (...) This paper also aims to compare two different ‘styles’ of engineering. Fleming, whose educational background included Cambridge experimental physics, based his approach upon scientific engineering—that is, laboratory experiments, precise measurement, and mathematical considerations, whereas Marconi's work derived from an older style of doing technology—that is, field experiments, handicraft work, and an intuitive understanding of technological effects. These two different styles clashed in the experiment, and it will be shown that this tension became apparent when credit for a project's success was being assigned. (shrink)

: Several recent studies in science and technology studies (STS), and in the history of science and technology, have highlighted the stochastic and uncontrollable nature of technological trajectory. In this paper I will examine three technologies--the Triode, the numerically controlled (NC) machine tool, and the Internet--each of which reflects a different aspect of technological uncertainty. I will argue that the Triode's seemingly unpredictable evolution is partly caused by limitations in our present historical knowledge about it. The NC machine's mysteriously unpredictable (...) life emerged partly from the unpredictability in the conflict between workers and managers, and partly from historians' blurring the boundary between workers and managers, combining them into one general category--humans--and contrasting humans with machines. Finally, I will show that the Internet's tremendous momentum should not be interpreted as showing technology's autonomous life, since American engineers constantly intervened in its course through public shows and through the negotiation for international standardization procedures. On this basis, I will also critically examine the cultural meaning of autonomous technology including the constructivist discourses of nonhuman agency. (shrink)