Papers by Willem Hackmann
Nature, 1999
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Nature, Feb 1, 1993
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Gold Bulletin, Sep 1, 1974
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1. Prologue The collection of the Clarendon Laboratory in Oxford possesses a remarkable instrumen... more 1. Prologue The collection of the Clarendon Laboratory in Oxford possesses a remarkable instrument that has been ringing almost continuously since it was purchased from Watkins & Hill of London in 1840 (figure 1). 1 A tiny brass clapper suspended by a silk fibre moves to and fro between the bells attached to the base of two vertical pillars, known as “dry piles”. These are connected in series, sealed in a coating of sulphur, and housed under a glass dome to keep out the dust. Its fame has secured it a place in the Guinness Book of Records . This device closely resembles the one described by George John Singer in his textbook of 1814 (figure 3). 2 The dry pile, although it became to be regarded as a novelty, also had its brief moment of glory in the debate concerning the relationship between “classical” high-tension electrostatic experiments and Volta’s low-tension experiments with the voltaic pile. The debate over the dry pile highlights the nature of scientific evidence and the key...
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Studies in History and Philosophy of Science Part A, 1991
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The American Archivist, 1968
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Nature, 1992
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Nature, 1986
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Nature, 1990
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Nature, 1987
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Nature, 1987
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Nature, 1990
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Nature, 1993
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Nature, 1996
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Nature, 1991
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Nature, 1988
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Nature, 1989
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Nature, 1985
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Nature, 1980
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Papers by Willem Hackmann