Paper, 'On the calculus of symbols - third memoir' by W H L [William Henry Leighton] Russell Subject: Mathematics Published in Philosophical Transactions as 'On the calculus of symbols.—Third memoir'. Communicated by A [Arthur] Cayley. Received by the Royal Society on 15 May 1863. Read 21 May 1863. Abstract published in Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London [later Proceedings of the Royal Society of London], Volume 12, 1863. [1863]