TY - JOUR T1 - On Discontinuous Phosphorescent Spectra in High Vacua JF - Proceedings of the Royal Society of London (1854-1905) VL - 32 SP - 206 EP - 213 PY - 1881/01/01/ UR - http://dx.doi.org/10.1098/rspl.1881.0022 M3 - doi:10.1098/rspl.1881.0022 AU - Crookes, W. ER -