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Miller, July, vol. 41, pp. 553-554. 



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24. 1913. Hildebrand, H. W. Origin of spark in dust explosions. Amer. Miller, 



Oct., vol. 41, p. 786. 



25. 1913. Another dust warning (^editorial note). Amer. Miller, Oct., vol. 41, p. 791. 



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 • Factory and Workshop Acts. 



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Aug. 14, pp. 209-210. 



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