Paper, 'A few facts relative to the colouring matters of some vegetables' by James Smithson Subject: Chemistry Published in Philosophical Transactions as 'A few facts relative to the colouring matters of some vegetables'. Read 18 December 1817. 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 2, 1833. [1817]