Paper, 'Account of the experiments made at Holyhead (North Wales) to ascertain the transit velocity of waves, analogous to earthquake waves through the local rock formations' by Robert Mallet Subject: Physics / Seismology Published in Philosophical Transactions as 'Account of experiments made at Holyhead (North Wales) to ascertain the transit-velocity of waves, analogous to earthquake waves, through the local rock formations'. Received by the Royal Society on 18 June 1861. Read 20 June 1861. 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 11, 1862. 15 June 1861