TY - JOUR T1 - On the Mathematical Theory of Combined Streams JF - Proceedings of the Royal Society of London (1854-1905) VL - 19 SP - 90 EP - 94 PY - 1870/01/01/ UR - http://dx.doi.org/10.1098/rspl.1870.0018 M3 - doi:10.1098/rspl.1870.0018 AU - Rankine, W. ER -