Chronology of events: 1673--1679

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
April 1, 1679 cousin Maerten Huijchs Leeuwenhoek appointed tax master
April 12, 1679 Lambert van Velthuysen wrote to Leeuwenhoek about some of his observations
April 25, 1679 Wrote Letter 28 of 1679-04-25 (AB 43) to Nehemiah Grew
April 27, 1679 Wrote letter of 1679-04-27 (AB 44) to Constantijn Huygens
May 1, 1679 Visited by James, Duke of York, and "several high personages"
May 4, 1679 mentor Constantijn Huygens called Leeuwenhoek the "magician of Delft"
May 11, 1679 Wrote letter of 1679-05-11 (AB 45) to Lambert van Velthuysen
May 15, 1679 Wrote letter of 1679-05-15 (AB 46) to Christiaan Huygens
May 20, 1679 Wrote letter of 1679-05-20 (AB 47) to Constantijn Huygens
June 13, 1679 Wrote letter of 1679-06-13 (AB 48) to Nehemiah Grew
June 13, 1679 Wrote letter of 1679-06-13 (AB 49) to Lambert van Velthuysen
July 11, 1679 Wrote letter of 1679-07-11 (AB 50) to Lambert van Velthuysen
August 15, 1679 Appointed city inspector of imported and exported liquids / wine gauger
August 25, 1679 Called "an unlearned, but ingenious man" by Peter Pels
September 4, 1679 colleague Nicolaas van der Sloot appointed co-wine gauger
September 17, 1679 Paid tax on his personal stock of wijn
October 13, 1679 Wrote letter of 1679-10-13 (AB 51) to Robert Hooke
October 30, 1679 cousin Pieter Abrahams Hogenhouck buried
November 1, 1679 Philosophical Collections number 1 published in London; one letter by Leeuwenhoek
November 14, 1679 Wrote letter of 1679-11-14 (AB 52) to Lambert van Velthuysen
November 20, 1679 Wrote letter of 1679-11-20 (AB 53) to Robert Hooke

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