TY - JOUR T1 - The Measurement of the Power Given by Any Electric Current to Any Circuit JF - Proceedings of the Royal Society of London (1854-1905) VL - 49 SP - 424 EP - 439 PY - 1890/01/01/ UR - http://dx.doi.org/10.1098/rspl.1890.0110 M3 - doi:10.1098/rspl.1890.0110 AU - Ayrton, W. AU - Sumpner, W. ER -