TY - JOUR T1 - The Variation of the Compass; Containing 1719 Observations to, in, and from, the East Indies, Guinea, West Indies, and Mediterranean, with the Latitudes and Longitudes at the Time of Observation. The Longitude for the Most Part Reckoned from the Meridian of London; If Otherwise, It is Taken Notice of in the Margin. By Mr. Robert Douglass. Recommended to the Public by the Late Dr. Halley. Communicated by the Rev. Nevil Maskelyne, Astronomer Royal, F. R. S. with a Letter Prefixed from William Mountaine, Esq. F. R. S. to Mr. Maskelyne JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 66 SP - 18 EP - 72 PY - 1776/01/01/ UR - http://dx.doi.org/10.1098/rstl.1776.0003 M3 - doi:10.1098/rstl.1776.0003 AU - Douglass, R. AU - Mountaine, W. AU - Maskelyne, N. AU - Halley, E. ER -