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

angle angular momentum Article Astronomical Meridian attraction axis azimuth blue end blue magnetism blue pole broadside-on BROOKE FOSS WESTCOTT c₁ c₂ Cambridge cloth College compass compass-needle cotan Crown 8vo curves d₁ deflexion deviation direction distance disturbed needle disturbing magnet effect end-on equal error fcap Figure formulæ Greenwich horizontal action induced magnetism investigations latitude longitude magnet-power Magnetic Declination magnetic force magnetic meridian Magnetic Pole mass of iron Mathematical measure method Metric system moment of inertia North Magnetic Pole numerical value observations obtained opposite position produced red end red magnetism red pole remarked repulsion rotation Royal Observatory Schools sensible ship ship's head steel magnet student subpermanent magnetism suspension-thread term terrestrial horizontal force terrestrial magnetism theodolite theory tion torsion-power total force vertical force vibration wire δμ θ₂