Letter, from Antoni van Leeuwenhoek to James Jurin, dated at Delft Concerning the reproduction of micro-organisms and about the palpitation of the diaphragm. One of Leeuwenhoek's final two letters to the Royal Society, translated into Latin at Leeuwenhoek's request by Dr Jan Hoogvliet, see Hoogvliet's covering letter at EL/H3/112 Printed in 'Philosophical Transactions', vol 32, no 380, p 438 August 1723