A summary, in French, of a letter to Duhamel from Hales (probably the letter from Stephen Hales discussing his ventilators and his proposal for bladder stones, which can be seen as item MS/2001/01.) There is a comment at the end about the difficulty in reading Hales’ writing due to [Hales’] “son grand age et surtout le tremblement de mains qui lui est survenu” – his old age and especially the trembling hands that occurred to him.