TY - JOUR T1 - On a Class of Differential Equations, Including those Which Occur in Dynamical Problems JF - Proceedings of the Royal Society of London (1854-1905) VL - 7 SP - 4 EP - 7 PY - 1854/01/01/ UR - http://dx.doi.org/10.1098/rspl.1854.0003 M3 - doi:10.1098/rspl.1854.0003 AU - Donkin, W. ER -