Letter, from Antoni van Leeuwenhoek to the Royal Society, dated at Delft Signed autograph Examination of the germ of wheat and of germinating wheat; structure of barley, oats, buckwheat, millet, canary seed, and the seeds of sorrel, beetroot, marjoram, cheril, radish, rape, cauliflower, black radish, turnip, clover, mustard, hemp, scury grass, cress, rocket, blue melilote 28 figures are described; engraved figures for publication are attached Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 6, p 251 13 June 1687