TY - JOUR T1 - Measurement of the Electromotive Force Required to Produce a Spark in Air between Parallel Metal Plates at Different Distances JF - Proceedings of the Royal Society of London (1854-1905) VL - 10 SP - 326 EP - 338 PY - 1859/01/01/ UR - http://dx.doi.org/10.1098/rspl.1859.0064 M3 - doi:10.1098/rspl.1859.0064 AU - Thomson, W. ER -