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Arithmetic in the Plainest and Most Concise Methods Hitherto Extant: With New Improvements for Dispatch of Business in All the Several Rules. As Also Fractions, Vulgar and Decimal, Wrought Together After a New Method...
IV. A letter from Mr. Leeuwenhoeck, FRS concerning the muscular fibres in several animals, and the magnetick quality acquired by iron, upon standing for a long time in the same posture