The Description and Use of the Sector by Edmund Gunter, 1636

Numéro d’image : 12903426
The Description and Use of the Sector by Edmund Gunter, 1636
Title page of The Description and Use of the Sector by Edmund Gunter, 1636. It shows mariners holding various navigational instruments, including a sector and a cross-staff at the top, and a horary quadrant at bottom right. Gunter (1581-1626) was an English mathematician and astronomer who invented many measuring instruments which bear his name; Gunter's Chain, the 22-yard-long, 100-link chain used by surveyors; Gunter's Line, the forerunner of the modern slide-rule; Gunter's Scale, a navigational tool; and the portable Gunter's Quadrant. He also introduced the words cosine and cotangent into the language of trigonometry. (London, 1636).
Licence : Droits gérés
Crédit: Science Photo Library / Heritage Images / Oxford Science Archive
Taille de l’image : 3688 px × 4733 px
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