Paper, 'On the frequent occurrence of indigo in human urine; and on its chemical, physiological, and pathological relations' by Arthur Hill Hassall Subject: Medicine / Chemistry Published in Philosophical Transactions as 'On the frequent occurrence of Indigo in human urine, and on its chemical, physiological, and pathological relations'. Communicated by Professor [William] Sharpey. Received by the Royal Society on 10 June 1854. Read 15 June 1854. 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 7, 1856. [1854]