Letter, from [Gilles] de Launay to Henry Oldenburg, dated at Paris Glad that his work 'Essais physiques' was received well and that he will be sending further work to the Royal Society for constructive criticism Transcription and translation see 'The correspondence of Henry Oldenburg', ed and trans by A Rupert Hall & Marie Boas Hall, vol 4, p 217 10 March 1668