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Keywords: Playfair TimeSeries.png Time series graph of trade balances William Playfair 1786 The Commercial and Political Atlas Representing by Means of Stained Copper-Plate Charts the Progress of the Commerce Revenues Expenditure and Debts of England during the Whole of the Eighteenth Century 1786 William Playfair 1759-1823 copyright expired 120px 120px 120px PD-old-100 18th-century diagrams William Playfair History of visualization |