Chronology of events: 1687--1694

For some events, the year is certain but the month and day are not. Example: We know only the year for the collections of Leeuwenhoek's letters published in Dutch during his lifetime.

For other events, the season or month are certain but the day is not. Example: Leeuwenhoek mentions that someone visited him "last month".

On the other hand, many events did indeed happen on the first day of a month. Example: public appointments to Delft's city offices took effect on January 1 of each year. Thus:

  • A date of January 1 in a given year may indicate that the year is certain but the month and day are not.
  • A date of 1 in a given month may indicate that the year and month are certain but the day is not.

Unless otherwise indicated, for events in England, the date given is Old Style, 10 days behind the Dutch Republic's New Style until 1700 and then 11 days behind.

Date
September 18, 1693 Paul Durven appointed curator
September 26, 1693 cousin Sara Maertens Leeuwenhoek buried
October 15, 1693 Wrote Letter 76 of 1693-10-15 (AB 126) to Members of the Royal Society
October 27, 1693 Wrote letter of 1693-10-27 (AB 127) to Pieter Rabus
November 19, 1693 nephew Johannes Adriaans Swalmius buried
November 21, 1693 Appointed guardian of his dying wife Cornelia Swalmius
November 30, 1693 Hans Sloane was elected Secretary of the Royal Society and editor of Philosophical Transactions. He published 68 articles by Leeuwenhoek over the next twenty years.
December 5, 1693 Rented St. Agnieten Tooren from the city for 12 years
December 7, 1693 wife Cornelia Swalmius made a will
December 8, 1693 Wrote letter of 1693-12-08 (AB 128) to Richard Waller
December 20, 1693 Wrote Letter 77 of 1693-12-20 (AB 129) to Members of the Royal Society
December 26, 1693 wife Cornelia Swalmius made a will including Maria
December 29, 1693 Sold the garden outside the walls of the city
January 1, 1694 Published Onsigbare Geschapene Waarheden (Invisible Creation Truths), Letters 32, 39, 33
January 1, 1694 Published Vierde Vervolg der Brieven (Fourth Continuation of the Letters), Letters 76 - 83
January 6, 1694 wife Cornelia Johannes Swalmius buried
January 19, 1694 Wrote letter of 1694-01-19 (AB 130) to Richard Waller
January 24, 1694 Wrote Letter 78 of 1694-01-24 (AB 131) to Members of the Royal Society
January 31, 1694 Richard Waller wrote to Leeuwenhoek about colors and sperm inside of eggs
February 12, 1694 Wrote letter of 1694-02-12 (AB 132) to Richard Waller
February 12, 1694 Presented act of guardianship to the Weeskamer after Cornelia's death
February 24, 1694 Wrote Letter 79 of 1694-02-24 (AB 133) to Members of the Royal Society
February 28, 1694 Benedictus Haan wrote to Leeuwenhoek agreeing with him against George Garden about the female ovary
March 2, 1694 Wrote Letter 80 of 1694-03-02 (AB 134) to Members of the Royal Society
March 2, 1694 Presented Cornelia's will to the Weeskamer
March 19, 1694 Wrote Letter 81 of 1694-03-19 (AB 135) to Members of the Royal Society
April 2, 1694 Wrote Letter 82 of 1694-04-02 (AB 136) to Members of the Royal Society
April 30, 1694 Wrote Letter 83 of 1694-04-30 (AB 137) to Members of the Royal Society
May 11, 1694 Received an honorarium from the city for the Fourth Continuation of the Letters
May 26, 1694 Wrote letter of 1694-05-26 (AB 138) to Richard Waller
September 14, 1694 Wrote Letter 84 of 1694-09-14 (AB 139) to Richard Waller
November 3, 1694 Lent 400 guilders to Leendert van Bijstervelt
November 24, 1694 cousin Maerten Huijchs Leeuwenhoek buried
November 29, 1694 microscopist Marcello Malpighi died
November 30, 1694 Wrote Letter 85 of 1694-11-30 (AB 140) to Pieter Rabus

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