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Clavel, Roger. Tabulae foeneratoriae, or tables for the forbearance and discompt of money. : Likewise tables for the forbearance, discompt, and purchase of annuities to 31 years at the rate of 6l. per cent. per annum, according to the late act of Parliament. Calculated by Roger Clavell, Gent. student in the mathematicks. And a table for the summing up of commodities, composed by Mr. Webster, but altered into another form by the author abovesaid. All performed by addition only