Unpublished letter, regarding 'Sur la transformation gazeuse de l'eau, ay moyen de la pile dans seux compartiments' [On the gaseous transformation of water, by means of two separate compartments] from Daniel Paret to the President of the Royal Society Paret presents corrections to his original paper on the gaseous transformation of water and further clarifies details of his experiments. Subject: Chemistry Received 24 October 1849. Written by Paret in Grenoble [France]. Whilst the Royal Society declined to publish this paper in full, an abstract of the paper was published in volume 5 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 gaseous transformation of water, by means of a pile in two separate compartments having no other electric communication between them besides conducting wires of copper, and giving, in the one oxygen alone, and hydrogen alone in the other'. 8 October 1849