TY - JOUR T1 - On the Physical Characters of the Lines in the Spark Spectra of the Elements JF - Proceedings of the Royal Society of London (1854-1905) VL - 49 SP - 448 EP - 451 PY - 1890/01/01/ UR - http://dx.doi.org/10.1098/rspl.1890.0114 M3 - doi:10.1098/rspl.1890.0114 AU - Hartley, W. ER -