Unpublished paper, 'The electric fluid' by W F [William Ford] Stevenson Stevenson denies the existence of two electric fluids, and maintains that all the phenomena are explicable on the hypothesis of a single fluid, which when present in a conducting body renders it positive, and in a non-conducting body, negative. A body which is naturally a conductor, may, he asserts, be rendered otherwise, by changing its form. Pencil marking on front reads 'Col [Edward] Sabine'. Subject: Physics / Electricity Received 11 November 1845. An abstract of the paper was published in volume 5 of Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London [later Proceedings of the Royal Society] as 'The electric fluid'. November 1845