Letter, from Antoni van Leeuwenhoek to the Royal Society, dated at Delft Signed autograph Observations of the structure and germination of orange pips from Surinam and Curacao Read to the Royal Society on 14 April 1703 22 figures in red chalk attached English translation see EL/L3/52 Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 14, p 217 English translation printed in 'Philosophical Transactions', vol 23, no 287, p 1461 26 February 1703