TY - JOUR T1 - The Determination of the Secular Effects of Tidal Friction by a Graphical Method JF - Proceedings of the Royal Society of London (1854-1905) VL - 29 SP - 168 EP - 181 PY - 1879/01/01/ UR - http://dx.doi.org/10.1098/rspl.1879.0028 M3 - doi:10.1098/rspl.1879.0028 AU - Darwin, G. ER -