Henry Oldenburg wrote to Leeuwenhoek encouraging him to send more observations

August 20, 1674

This letter was probably a reply to Leeuwenhoek's letter of 1674-06-26. Leeuwenhoek mentioned it in his letter of 1674-10-19. Oldenburg relayed a message from Robert Boyle and encourged Leeuwenhoek to continue sending his observations.


The manuscript is lost and the letter was never printed.