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On the History of Gunter's Scale and the Slide Rule During the Seventeenth Century

Note 17 — III. RICHARD DELAMAIN’S GRAMMELOGIA

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Oughtred’s description of his circular slide rule of 1632 and his rectilinear slide rule of 1633, as well as a drawing of the circular slide rule, are reproduced in Cajori’s History of the Slide Rule, Addenda, pp. ii-vi.

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