alb3804222

Hadley's Quadrant and Sextant, 1806

Share
Pinterest
Twitter
Facebook
Copy link
Email

Add to another lightbox

Do you already have an account? Sign in

You do not have an account? Register

Buy this image. Select the use:

Title: Hadley's Quadrant and Sextant, 1806

Caption: 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.

Category: ILLUSTRATION • Science: History

Credit: Album / Science Source / Wellcome Images

Releases: ? Model Release: No - ? Property Release: No
Rights questions?

Image size: 3957 × 2311 px | 26.2 MB

Print size: 33.5 × 19.6 cm | 1557.9 × 909.8 in (300 dpi)

Keywords: 1800S • 1806 • 19TH CENTURY • ART • ARTWORK • ASTRONOMIA • ASTRONOMICAL • ASTRONOMY • DRAWING • ENGRAVING • HADLEY • HISTORIC • HISTORICAL • HISTORY • ILLUSTRATION • ILLUSTRATIONS • ILUSTRATION • NAVIGATION • NAVIGATIONAL INSTRUMENT • NAVIGATIONAL TOOL • NAVIGATIONAL • OCTANT • QUADRANT • SCIENCE: HISTORY • SEXTANT