Paper, 'The description and life of an apparatus added as an improvement to Davis's quadrant, consisting of a mercurial level for taking the co-altitude of the Sun or star at sea, without the visual assistance of the sensible horizon which frequently is obscure' by Charles Leigh
Reference number: CLP/8ii/58
Date: 28 June 1739
Description
Leigh describes apparatus used to measure the altitude of the Sun. He states that 'to arrive at the utmost perfection in navigation, three things are absolutely requisite, viz, the variation, the latitude, the longitude'. Includes two copies of testimonial signed by Thomas Strachey, Thomas Griffin, J Irving and William Slanning, and a figure of the apparatus.
Subject: Astronomy / Navigation / Scientific apparatus and instruments
Read to the Royal Society on 28 June 1739
Published in Philosophical Transactions as 'The description and use of an apparatus added as an improvement to Davis's quadrant, consisting of a mercurial level, for taking the co-altitude of sun or star at sea, without the usual assistance of the sensible horizon, which frequently is obscured'
- Reference number
- CLP/8ii/58
- Earliest possible date
- 28 June 1739
- Physical description
- Ink on paper
- Page extent
- 11 pages
- Format
- Manuscript
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Charles Leigh, Paper, 'The description and life of an apparatus added as an improvement to Davis's quadrant, consisting of a mercurial level for taking the co-altitude of the Sun or star at sea, without the visual assistance of the sensible horizon which frequently is obscure' by Charles Leigh, 28 June 1739, CLP/8ii/58, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/clp_8ii_58/paper-the-description-and-life-of-an-apparatus-added-as-an-improvement-to-daviss-quadrant-consisting-of-a-mercurial-level-for-taking-the-co-altitude-of-the-sun-or-star-at-sea-without-the-visual-assistance-of-the-sensible-horizon-which-frequently-is-obscure-by-charles-leigh, accessed on 10 December 2024
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Related Publications
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II. The description and use of an apparatus added as an improvement to Davis's quadrant, consisting of a mercurial level, for taking the co-altitude of sun or star at sea, without the usual assistance of the sensible horizon, which frequently is obscured External link, opens in new tab.
Date: 31st December 1738
DOI: 10.1098/rstl.1737.0073
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Charles Leigh
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Classified Papers
Dates: 1592-1741
The 'Classified Papers' of the Royal Society are papers from British and international natural philosophers and scholars categorised according to subject areas.View collection