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Hadley's Quadrant and Sextant, 1806
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Titre: Hadley's Quadrant and Sextant, 1806
Légende: Voir la traduction automatique
Engraving of Hadley's quadrant and sextant, 1806. Sir Isaac Newton (1643-1727) invented the principle of the doubly reflecting navigation instrument (a reflecting quadrant), but never published it. Two men independently developed the octant around 1730: John Hadley (1682-1744), an English mathematician, and Thomas Godfrey (1704-1749), a glazier in Philadelphia. John Bird made the first sextant in 1757. The octant and later the sextant, replaced the Davis quadrant as the main instrument for navigation.
Engraving of Hadley's quadrant and sextant, 1806. Sir Isaac Newton (1643-1727) invented the principle of the doubly reflecting navigation instrument (a reflecting quadrant), but never published it. Two men independently developed the octant around 1730: John Hadley (1682-1744), an English mathematician, and Thomas Godfrey (1704-1749), a glazier in Philadelphia. John Bird made the first sextant in 1757. The octant and later the sextant, replaced the Davis quadrant as the main instrument for navigation.
Crédit: Album / Science Source / Wellcome Images
Autorisations: ? Autorisation de modèle: Non - ? Autorisation de propriété: Non
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Taille de l'image: 3957 × 2311 px | 26.2 MB
Taille d'impression: 33.5 × 19.6 cm | 1557.9 × 909.8 in (300 dpi)
Mots clés: ASTRONOMIE • ILLUSTRATION • NAVIGATION • QUADRANT • SCIENCE: ASTRONOMIE • SEXTANT
