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John Perry
John Perry
Discussion at Johannesburg on the Teaching of Elementary Mechanics. Britiash Association Meeting in South Africa, 1905
John Perry
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England's Neglect of Science; London, 1900
John Perry
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England's Neglect of Science
John Perry
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The Romance of Science. Spinning Tops: The "Operatives' Lecture" of the British Association Meeting at Leeds, 6th September, 1890
John Perry
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Spinning tops. The "Operatives' lecture" of the British Association meeting at Leeds, 6th September, 1890
John Perry
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