Unpublished manuscript, 'On the diurnal temperature of the Earth's surface, with the discussion of a simple formula proposed for approximating to the same' by S M [Solomon Moses] Drach Drach writes of the difficulties of determining the daily temperatures at any point on the Earth's surface, and shares a formula for approximating daily temperatures. Includes one page of figures separate to the text. Marked on front as 'Revised copy'. Subject: Geology / Radiation / Climate Received 31 December 1842. 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 diurnal temperature of the Earth’s surface, and the discussion of a simple formula for ascertaining the same'. 27 December 1842