Unpublished letter, 'On the régar [regur] or the black cotton-soil of India' from T J [Thomas John] Newbold to the Secretary of the Royal Society Newbold finds, by chemical analysis, that this soil consists of silica, lime, alumina, iron oxide, and minute amounts of vegetable and animal debris. He believes the soil to be a sedimentary deposit from still waters. Marked on back as 'archives' by Peter Mark Roget. Subject: Mineralogy / Pedology Received 8 March 1838. Communicated by S [Samuel] Hunter Christie. Written by Newbold in Bellary, Madras [Chennai, India]. Whilst the Royal Society declined to publish this paper in full, an abstract of the paper was published in volume 4 of Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London [later Proceedings of the Royal Society] as 'On the régar or black cotton soil of India'. 12 August 1837