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The Royal Society: Science in the Making

'Description and Use of an improv'd equinoctial Dial for shewing the hour by the Sun or any of the Stars, with great Exactness Contrived and finish'd Anno 1727 by Richard Graham'

Reference number: RBO/17/7

Date: 1731

Description

That Graham had already constructed a dial to find the time by the sun or stars (for William Ross's model see RBO/17/6 page 21)
Original figure in colour attached
Read to the Royal Society on 16 March 1731

Reference number
RBO/17/7
Earliest possible date
1731
Page extent
5 pages
Format
Manuscript

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Citation

'Description and Use of an improv'd equinoctial Dial for shewing the hour by the Sun or any of the Stars, with great Exactness Contrived and finish'd Anno 1727 by Richard Graham', 1731, RBO/17/7, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/rbo_17_7/description-and-use-of-an-improvd-equinoctial-dial-for-shewing-the-hour-by-the-sun-or-any-of-the-stars-with-great-exactness-contrived-and-finishd-anno-1727-by-richard-graham, accessed on 14 May 2026

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https://makingscience.royalsociety.org/items/rbo_17_7/description-and-use-of-an-improvd-equinoctial-dial-for-shewing-the-hour-by-the-sun-or-any-of-the-stars-with-great-exactness-contrived-and-finishd-anno-1727-by-richard-graham

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