Paper, 'An account of Thomas Godfrey's improvement of Davy's [Davis's] quadrant transferred to the mariner's bow' by J Logan Logan writes: 'Being informed that this improvement, proposed by Thomas Godfrey of this place, for observing the Sun's altitude at sea, with more ease and expedition than is practicable by the common instruments in use for that purpose.' Includes two geometricl diagrams in the text and an engraved figure from Philosophical Transactions. Subject: Astronomy / Navigation / Scientific Apparatus and equipment Read to the Royal Society on 6 January 1734 Published in Philosophical Transactions as 'An account of Mr. Thomas Godfrey's improvement of Davis's quadrant, transferred to the mariner's-bow' 1734