TY - JOUR T1 - On the Theory of Elliptic Motion JF - Proceedings of the Royal Society of London (1854-1905) VL - 10 SP - 430 EP - 432 PY - 1859/01/01/ UR - http://dx.doi.org/10.1098/rspl.1859.0079 M3 - doi:10.1098/rspl.1859.0079 AU - Cayley, A. ER -