Unpublished paper, 'Causes de la variation diurne de l'Aiguille aimantée, de la lumière zodiacale, des Aurores Boreales, et méthode simplifiée pour le relèvement des longitudes' [Causes of the diurnal variation of the magnetic needle, of the zodiacal light, of the Aurora Borealis, and simplified method for the bearing of longitudes] by Demouville Demouville shares observations on magnetic needle experiments. Marked as 'archive' by John George Children. Subject: Magnetism Received 28 February 1836. Read 15 June 1836. Whilst the Royal Society declined to publish this paper in full, an abstract of the paper was published in volume 3 of Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London [later Proceedings of the Royal Society] as 'Causes de la variation diurne de l'Aiguille aimantée, de la lumière zodiacale, des Aurores Boreales, et méthode simplifiée pour le relèvement des longitudes' [attributed to Demonville]. 1836