A Treatise on Magnetism Designed for the Use of Students in the University

accurate angle angular momentum Astronomical Meridian attraction axis azimuth blue end blue magnetism blue pole broadside-on compass compass-needle cot 0₁ cotan deflexion deviation dipping-needle direction distance disturbing magnet disturbing needle dV dV earth's surface effect end-on error expression formulæ Greenwich hori horizontal action horizontal plane induced magnetism induction investigations latitude longitude magnet-power magnetic force magnetic meridian Magnetic Pole mass of iron measured molecular magnet moment of inertia netism North Magnetic Pole numerical value observations obtained opposite ordinate parallel position produced proportion red end red magnetism red pole remarked represented repulsion rotation Royal Observatory sensible shewn ship ship's head soft iron steel magnet subpermanent magnetism supposed suspension-thread term terrestrial horizontal force terrestrial magnetism theodolite theory tion torsion-power total force total terrestrial True Dip vertical force vibration wire zontal αλ δμ