TY - JOUR T1 - Observations of Latitude and Variation, Taken on Board the Hartford, in Her Passage from Java Head to St. Hellena, Anno Dom. 173 $\frac{1}{2}$ Communicated by Edmund Halley, LL. D. Regius Astronomer at Greenwich JF - Philosophical Transactions (1683-1775) VL - 37 SP - 331 EP - 336 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1731.0058 M3 - doi:10.1098/rstl.1731.0058 AU - Halley, E. ER -