TY - JOUR T1 - An Account of Observations Made of the Variation of the Horizontal Needle at London, in the Latter Part of the Year 1722, and Beginning of 1723. By Mr. George Graham, Watchmaker, F. R. S. JF - Philosophical Transactions (1683-1775) VL - 33 SP - 96 EP - 107 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1724.0020 M3 - doi:10.1098/rstl.1724.0020 AU - Graham, G. ER -