TY - JOUR T1 - On the Character of the Impurity Found in Nitrogen Gas Derived from Urea JF - Proceedings of the Royal Society of London (1854-1905) VL - 64 SP - 95 EP - 100 PY - 1898/01/01/ UR - http://dx.doi.org/10.1098/rspl.1898.0073 M3 - doi:10.1098/rspl.1898.0073 AU - Rayleigh, L. ER -