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The line of proportion or numbers, commonly called Gunters line, made easie By the which may be measured all manner of superficies and solids, as board, glass, pavement, timber, stone, &c. Also, how to perform the same by a line of equal parts, drawn from the centre of a two-foot-rule. Whereunto is added the use of the line of proportion improved: whereby all manner of superficies and solids, may both exactly and speedily be measured, without the help of pen or compasses, by inspection, looking only upon the ruler. The second edition corrected, and somewhat enlarged by William Leybourn.
Leybourn, William, 1626-1716. EEBO Cambridge University Library records - unstructured. [6], 16, [2], 156 p., plate :. London: printed by J.S. and are to be sold by George Sawbridge living on Clerken-well-Green, 1668.
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