TY - JOUR T1 - The Variation of the Magnetical Compass, Observed by Capt. Rogers, Commander of the Ship Duke, in His Passage from Cape St. Lucar in Calefornia to the Isle of Guam or Guana, One of the Ladrones, with Some Remarks Thereon. Communicated by the Same JF - Philosophical Transactions (1683-1775) VL - 31 SP - 173 EP - 176 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1720.0043 M3 - doi:10.1098/rstl.1720.0043 AU - Rogers, C. ER -