Debate on the Extension of a Patent. Stoves vs. Grates. The Mathematics of Music. Consumption of Coal. 'The Great Peat Delusion.” An Invention Wanted., scientific american, 1867-02-16

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Debate on the Extension of a Patent. Stoves vs. Grates. The Mathematics of Music. Consumption of Coal. 'The Great Peat Delusion.” An Invention Wanted., scientific american, 1867-02-16

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