Wrote Letter L-471 of 1709-09-10 to John Chamberlayne about the cutting edge of a razor and its nicks as well as its setting and maintenance
Date:
September 10, 1709
The original manuscript on four quarto pages, written and signed by Leeuwenhoek, is preserved at the Royal Society (MS. 2080. L 4. 29).
On the cover, Leeuwenhoek wrote, "for Mr. John Chamberlaijne in Westminster."