Paper, 'Observations respecting the natural production of saltpetre [saltpeter] on the walls of subterranean and other buildings' by John Kidd Subject: Chemistry / Geology Published in Philosophical Transactions as 'Observations respecting the natural production of saltpetre on the walls of subterraneous and other buildings'. Communicated by William Hyde Wollaston. Read 16 June 1814. 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 1, 1832. February 1814