Books by Potamian, Brother (sorted by release date) - Project Gutenberg

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Alias O'Reilly, M. F. (Michael Francis)
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The Letter of Petrus Peregrinus on the Magnet, A.D. 1269 active 13th century de Maricourt Pierre Nov 21, 2015
Makers of Electricity James J. Walsh and Brother Potamian Apr 21, 2014
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