TY - JOUR T1 - Some Physical Constants of Ammonia: A Study of the Effect of Change of Temperature and Pressure on an Easily Condensible Gas JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 78 IS - 521 SP - 28 EP - 42 PY - 1906/07/21/ UR - http://dx.doi.org/10.1098/rspa.1906.0055 M3 - doi:10.1098/rspa.1906.0055 AU - Perman, E. AU - Davies, J. ER -