Extract of a letter, from Antoni van Leeuwenhoek to Lambert van Velthuysen, dated at Delft Extract by Leeuwenhoek of his letter which he sent with Letter EL/L1/45 to Robert Hooke. Observations of people with gout in their finger joints, and about a certain man who tried Moxa (Chinese remedy for gout) to relieve the symptoms of gout; observations of bladder-stones Original letter is in the Delft City Archives Partial translation in English see EL/L1/43 Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists , vol 3, p 85 11 July 1679