The description and use of a new and easy formula, for determining the time of the day, [electronic resource] : the azimuth of the sun, and the latitude ... By Samuel Dunn, ...
- [London] : Printed for the author; and sold by him in Maiden-Lane, Covent Garden, 1777.
2p.,tables ; 1/8⁰.
- Eighteenth century collections online. Part 1.
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