Note 31 — VI. OUGHTRED’S GAUGING LINE, 1633
Reading edition
Oughtred, An Addition vnto the Vse of the Instrument called the Circles of Proportion, London, 1633, p. 63.
Reading edition
Oughtred, An Addition vnto the Vse of the Instrument called the Circles of Proportion, London, 1633, p. 63.