TY - JOUR T1 - On the Direct Synthesis of Ammonia JF - Proceedings of the Royal Society of London (1854-1905) VL - 21 SP - 281 EP - 282 PY - 1872/01/01/ UR - http://dx.doi.org/10.1098/rspl.1872.0057 M3 - doi:10.1098/rspl.1872.0057 AU - Donkin, W. ER -