TY - JOUR T1 - Observations upon the Variation of the Needle Made in the Baltick, Anno 1720. By Mr. William Sanderson. Communicated by Capt. Soame JF - Philosophical Transactions (1683-1775) VL - 31 SP - 120 EP - 120 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1720.0030 M3 - doi:10.1098/rstl.1720.0030 AU - Sanderson, W. AU - Soame, C. ER -