A Treatise on Magnetism: General and Terrestrial

acting pole Annual Inequality attraction azimuth bifilar bismuth centre coefficients coercitive force coincide collimator corresponding Crown 8vo curve declination declinometer deduced deflecting magnet denote determined diamagnetic direction distance disturbance diurnal inequality Earth's magnetic force easterly force Edition effect epoch equal fluids following table Force at Dublin force exerted formula free magnetism hemisphere Hence Hobarton horizontal force horizontal plane inducing action instrument intensity latitude latter longitude lunar magnetic axis magnetic body magnetic elements magnetic inclination magnetic meridian magnetic moment magnetic pole magnetometer magnitude maximum molecule moment of inertia nearly needle netic north pole northerly force numbers observations opposite paramagnetic perpendicular plate polarity position quantity R. A. Proctor repelled repulsion secular change similar poles Sir James Ross soft iron southern hemisphere steel summer suspended magnet suspension thread telescope temperature theodolite tion torsion variations vertical vibration vols winter wire Woodcuts