Hibbert's Magnetic Balance

The 1911 Catalogue of Scientific Apparatus published by W. G. Pye & Co. of Cambridge, England, lists Hibbert's Magnetic Balance at £1-1s. It had been developed by W. Hibbert of the Regent Street (London) Polytechnic, and relied on balancing magnetic forces against magnetic forces. The catalogue notes that the apparatus can be used for the following experiments:                      The comparison of the pole strength of two or more magnets                     The measurement of the intensity of the equatorial or axial field of a magnet                     The measurement in C.G.S. units of Currents and ratios of current strengths                     The measurement in C.G.S. units of pole strength                     Coulomb's Law     The magnetized ball on the right-hand side of the balance beam (with needle-point pivots) can be balanced against the magnetic field provided by the upper magnetized ball, or the current-carrying coil.

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