Paper, 'On a class of differential equations including those which occur in dynamical problems. Part I' by W F [William Fishburn] Donkin 139 manuscript pages including one figure. Subject: Mathematics Published in Philosophical Transactions as 'On a class of differential equations, including those which occur in dynamical problems.- Part I'. Written by Donkin in Oxford. Received by the Royal Society on 22 February 1854. Read 23 February 1854. 21 February 1854