TY - JOUR T1 - Results of a Preliminary Comparison of Certain Curves of the Kew and Stonyhurst Declination Magnetographs JF - Proceedings of the Royal Society of London (1854-1905) VL - 17 SP - 236 EP - 238 PY - 1868/01/01/ UR - http://dx.doi.org/10.1098/rspl.1868.0035 M3 - doi:10.1098/rspl.1868.0035 AU - Sidgreaves, W. AU - Stewart, B. ER -