TY - JOUR T1 - On the Estimation of Ammonia in Atmospheric Air JF - Proceedings of the Royal Society of London (1854-1905) VL - 18 SP - 286 EP - 288 PY - 1869/01/01/ UR - http://dx.doi.org/10.1098/rspl.1869.0063 M3 - doi:10.1098/rspl.1869.0063 AU - Brown, H. ER -