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

angle angular momentum Article 26 Astronomical Meridian attraction axis azimuth blue end blue magnetism blue pole broadside-on c₁ compass compass-needle cotan curves d₁ deflexion deviation Dipping-Needle direction distance disturbed needle disturbing magnet Earth's horizontal effect end-on equal error Figure formulæ Greenwich horizontal action horizontal magnetic horizontal plane induced magnetism investigations latitude longitude magnet-power Magnetic Declination magnetic force magnetic meridian Magnetic Pole mass of iron measure Metric system moment of inertia netism North Magnetic Pole numerical value observations obtained opposite parallel position produced proportion red end red magnetism red pole remarked represented repulsion Reversed Telescope rotation Royal Observatory sensibly ship ship's head soft iron statical force steel magnet subpermanent magnetism supposed suspension-thread term terrestrial horizontal force terrestrial magnetism theodolite tion torsion-power total force vertical force vibration wire zontal