The most important of Waller's papers are to be found in the ‘Comptes Rendus,’ in the ‘Philosophical Magazine,’ and in the ‘Philosophical Transactions.’ The Wallerian degeneration is described in the ‘Comptes Rendus,’ 1 Dec. 1851. The demonstration of the cilio-spinal centre was the result of work done jointly with Professor Budge, and is described in the ‘Comptes Rendus’ for October 1851. The function of the ganglion on the posterior root of each spinal nerve is published in the ‘Comptes Rendus’ (xxxv. 524). ‘The Microscopic Observations on the Perforation of the Capillaries by the Corpuscles of the Blood, and on the Origin of Mucus and Pus,’ appeared in the ‘Philosophical Magazine’ for November 1846, while the ‘Microscopic Investigations on Hail’ were printed in the same journal for July and August 1846 and March 1847.