TY - JOUR T1 - Observations on a Clock of Mr. John Shelton, Made at St. Helena: In a Letter to the Right Honourable Lord Charles Cavendish, Vice-President of the Royal Society, from the Reverend Nevil Maskelyne, M. A. F. R. S. JF - Philosophical Transactions (1683-1775) VL - 52 SP - 434 EP - 443 PY - 1761/01/01/ UR - http://dx.doi.org/10.1098/rstl.1761.0068 M3 - doi:10.1098/rstl.1761.0068 AU - Maskelyne, N. ER -