TY - JOUR T1 - A New Form of Spring for Electric and other Measuring Instruments JF - Proceedings of the Royal Society of London (1854-1905) VL - 36 SP - 297 EP - 319 PY - 1883/01/01/ UR - http://dx.doi.org/10.1098/rspl.1883.0113 M3 - doi:10.1098/rspl.1883.0113 AU - Ayrton, W. AU - Perry, J. ER -