TY - JOUR T1 - An Account of Mr. Thomas Godfrey's Improvement of Davis's Quadrant, Transferred to the Mariner's-Bow, Communicated to the Royal Society, by Mr. J. Logan JF - Philosophical Transactions (1683-1775) VL - 38 SP - 441 EP - 450 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1733.0062 M3 - doi:10.1098/rstl.1733.0062 AU - Godfrey, T. AU - Logan, J. ER -