October 30, 1676 |
Wrote Letter L-043 of 1676-10-30 to Henry Oldenburg about his discussions with Grew and Boyle as well as the unreliability of the postal system |
October 31, 1676 |
Constantijn Huygens wrote Letter L-044 to Leeuwenhoek about his son Christiaan's translating Letter L-040 |
November 7, 1676 |
Wrote Letter L-045 of 1676-11-07 to Constantijn Huygens summarizing the observations of little animals in Letter L-040 |
November 12, 1676 |
Henry Oldenburg wrote Letter L-046 to Leeuwenhoek that he would write at greater length soon |
November 18, 1676 |
Visited by Gottfried Leibniz |
November 25, 1676 |
Magistrates approved payment by Maria Thins so Leeuwenhoek could pay Vermeer's creditors |
November 27, 1676 |
Wrote Letter L-047 of 1676-11-27 to Henry Oldenburg, now lost |
January 1, 1677 |
Theodore Craanen wrote Letter L-048 to Leeuwenhoek, some time in 1677, requesting that his relative Johan Ham be allowed to visit |
January 1, 1677 |
Wrote Letter L-049 of some time in 1677 to Robert Boyle, now lost |
January 22, 1677 |
mentor Jacob Spoors buried |
January 26, 1677 |
Constantijn Huygens wrote to Oldenburg about Leeuwenhoek, a "painstaking man" who should be "cherished" |
January 30, 1677 |
cousin Lambrecht Huijchs Leeuwenhoek (1624-1701) bought Buitenwatersloot 214 |
February 2, 1677 |
Recovered twenty-six paintings from Jannetje Stevens to help pay Catherine Bolnes' creditors |
February 9, 1677 |
Christiaan Huygens wrote Letter L-050 of 1677-02-09 to Leeuwenhoek that his observations of little animals in spice infusions were well received in France |
February 11, 1677 |
The Royal Society read the first part of Leeuwenhoek's long Letter L-040 of the previous 9 October about little animals in various waters |
February 15, 1677 |
Wrote Letter L-051 of 1677-02-15 to Christiaan Huygens to thank him for translating a letter into French |
February 18, 1677 |
The Royal Society read the second part of Leeuwenhoek's long letter of 9 October 1676 |
February 22, 1677 |
Henry Oldenburg wrote Letter L-052 to Leeuwenhoek for more details about his method for observing little animals |
March 4, 1677 |
Henry Oldenburg wrote Letter L-053 to Leeuwenhoek requesting that he examine muscle fibers and brains |
March 8, 1677 |
Named quartermaster of the 2nd quarter |
March 8, 1677 |
The Royal Society read the third part of Leeuwenhoek's long letter of 9 October 1676 |
March 12, 1677 |
Maria Thins filed a legal action to prevent Leeuwenhoek from selling The Art of Painting |
March 15, 1677 |
Organized the auction of Vermeer's remaining paintings |
March 23, 1677 |
Wrote Letter L-054 of 1677-03-23 to Henry Oldenburg about the quantity of little creatures in one drop of water |
March 25, 1677 |
The Royal Society published Michael Butterfield's letter about melting glass to make spherical lenses |
March 25, 1677 |
The Royal Society published part of Leeuwenhoek's Letter L-040 of 9 October 1676 reporting little animals in infusions |
April 15, 1677 |
The Royal Society read Leeuwenhoek's Letter L-054 of 23 March 1677 and assigned Grew to replicate his results |
April 20, 1677 |
Henry Oldenburg wrote Letter L-055 to Leeuwenhoek relaying the compliments of the members of the Royal Society |
May 14, 1677 |
Wrote Letter L-056 of 1677-05-14 to Henry Oldenburg about muscles, blood, the movement of fluids in fruit, moxa, and cotton |
May 18, 1677 |
Benedict Haan and Henry Cordes wrote to the Royal Society attesting to the number of little animals in Leeuwenhoek's infusions |
May 27, 1677 |
The Royal Society read Leeuwenhoek's Letter L-056 of 14 May 1677 |
June 2, 1677 |
Robbert Gordon wrote to the Royal Society attesting to the number of little animals in Leeuwenhoek's infusions |
August 7, 1677 |
Henry Oldenburg wrote Letter L-057 to Leeuwenhoek, asking him to examine the skin of Moors and enclosing Philosophical Transactions no. 136 |
August 13, 1677 |
Aldert Hodenpijl wrote to the Royal Society attesting to the number of little animals in Leeuwenhoek's infusions |
August 21, 1677 |
Johannes Boogert, Robert Poitevin, and W. van der Burch wrote to the Royal Society attesting to the number of little animals in Leeuwenhoek's infusions |
August 30, 1677 |
Alex Petrie wrote to the Royal Society attesting to the number of little animals in Leeuwenhoek's infusions |
September 5, 1677 |
mentor Henry Oldenburg died in London |
September 11, 1677 |
Visited by Hennig Brand, the Hamburg merchant who discovered phosphorus |
October 1, 1677 |
Denis de Dodart wrote to Christiaan Huygens about his admiration for Leeuwenhoek: "people of this merit should be pensioned as external academicians" |
October 5, 1677 |
Wrote Letter L-058 of 1677-10-05 to Henry Oldenburg about skin, eels, fleas, and measuring and counting the little animals; enclosed testimonials |
October 16, 1677 |
Wrote Letter L-059 of 1677-10-16 to William Brouncker; he is sending some observations and a Latin translation |
October 25, 1677 |
The Royal Society requested that Robert Hooke try to replicate Leeuwenhoek's observations |
November 9, 1677 |
Wrote Letter L-060 of 1677-11-09 to William Brouncker about sperm and their movements in fresh human semen |
November 11, 1677 |
Robert Hooke failed to demonstrate "minute animals" in pump water. The Royal Society read the testimonials from people in Delft. |
November 15, 1677 |
Bought land near Berkelse Meer |
November 18, 1677 |
Robert Hooke again failed, using an improved microscope |
November 25, 1677 |
Robert Hooke finally succeeded in replicating Leeuwenhoek's observations of little animals |
December 2, 1677 |
Wrote Letter L-061 of 1677-12-02 to William Brouncker; now lost |
December 8, 1677 |
Constantijn Huygens wrote Letter L-062 to Leeuwenhoek about his observations of sperm |
December 10, 1677 |
Robert Hooke wrote Letter L-063 to Leeuwenhoek to acknowledge the receipt of Letter L-060 of November 1677 to describing sperm in human semen |
December 16, 1677 |
Robert Hooke demonstrated the superiority of single-lens over double-lens microscopes |
January 1, 1678 |
Robert Hooke's Lectures and Collections: Cometa, Microscopium published |
January 1, 1678 |
Wrote Letter L-064 of some time in 1678 to Robert Boyle; now lost |
January 11, 1678 |
Nehemiah Grew and Robert Hooke wrote Letter L-065 to Leeuwenhoek asking him to further observe sperm |
January 11, 1678 |
Nehemiah Grew wrote Letter L-066 of 1678-01-11 to Leeuwenhoek about comparisons of the size and shape of sperm from a variety of animals, the role of sperm in reproduction, and vessels in semen |
January 14, 1678 |
Wrote Letter L-067 of 1678-01-14 to Robert Hooke about human blood, blood transfusions, flea larvae, and little animals in pepper water |
January 27, 1678 |
Robert Hooke read Letter L-067 of 1678-01-14 at a meeting of the Royal Society |
February 1, 1678 |
Empowered a Gouda notary to sell Vermeer's property to help pay Catherine Bolnes's creditors |
February 3, 1678 |
Robert Hooke produced two experiments on blood and milk and read the latter part of the Letter L-067 of 1678-01-14 about phlegm and little animals in pepper water |
February 11, 1678 |
Robert Hooke wrote Letter L-068 to Leeuwenhoek about how he verified Leeuwenhoek’s observations of little animals in a pepper infusion |
February 14, 1678 |
Wrote Letter L-069 to Joseph Williamson, as Grew had requested |
February 28, 1678 |
Christiaan Huygens began a series of observations of little animals replicating and expanding on Leeuwenhoek's |
March 14, 1678 |
Christiaan Huygens observed little animals using dark-ground illumination |
March 17, 1678 |
Robert Hooke showed the Royal Society microscopical observations of tendons and little animals in anise and coffee |
March 18, 1678 |
Wrote Letter L-070 of 1678-03-18 to Nehemiah Grew about sperm in other animals and what Harvey and de Graaf got wrong about reproduction |
March 24, 1678 |
Robert Hooke read his paper about his microscopic observations and methods |
April 7, 1678 |
Robert Hooke showed the Royal Society microscopical observations of muscle from a lobster's claw |
April 20, 1678 |
Nehemiah Grew wrote Letter L-071 of 1678-04-20 to Leeuwenhoek about his criticisms of Leeuwenhoek's work |
April 28, 1678 |
Johannes Swammerdam wrote to Melchisedec Thévenot, saying that Leeuwenhoek "is biased, and reasons in a very barbarical way" |
April 28, 1678 |
Robert Hooke wrote Letter L-072 to Leeuwenhoek that King Charles saw the little animals in pepper water |
May 5, 1678 |
Robert Hooke showed the Royal Society microscopical observations of the motion and composition of muscles |
May 9, 1678 |
niece Maria Jans de Molijn buried |
May 31, 1678 |
Wrote Letter L-073 of 1678-05-31 to Nehemiah Grew about teeth, bone, hair, and sperm and what de Graaf got wrong about ovulation |
June 6, 1678 |
Christiaan Huygens wrote to Nehemiah Grew about seeing the sperm in human semen |
June 11, 1678 |
Christiaan Huygens observed little animals in water that Leeuwenhoek had sent to him |
July 4, 1678 |
Lambert Twent named first postmaster of Delft |
September 17, 1678 |
Christiaan Huygens again observed little animals using dark-ground illumination |
September 27, 1678 |
Wrote Letter L-074 of 1678-09-27 to Nehemiah Grew about sweat and globules in saliva and blood |
October 13, 1678 |
Nehemiah Grew wrote Letter L-075 of 1678-10-13 to Leeuwenhoek that Letter L-073 about male sperm and female ovulation in humans would be printed "as far as decency permits" |
October 14, 1678 |
sister Margrieta Philips Leeuwenhoek buried |
November 6, 1678 |
daughter Maria registered as a member of the Hervormde Gemeente Delft (Reformed Church in Delft) |
November 10, 1678 |
Christiaan Huygens's method of melting powdered glass to make a spherical lens |
December 23, 1678 |
Constantijn Huygens wrote Letter L-076 to Leeuwenhoek about the identification of little animals observed in pepper-water by his son Christiaan as well as the latter’s description of the scales on the wings of butterflies |
December 26, 1678 |
Wrote Letter L-077 of 1678-12-26 to Constantijn Huygens about how son Christiaan's observations of little animals correspond to his own |
January 25, 1679 |
Authorized to administer the estate of Ernst Gerrits de Bruijn |
February 10, 1679 |
Appointed curator; Johannes Blaucamer guarantor |
February 21, 1679 |
Wrote Letter L-078 of 1679-02-21 to Nehemiah Grew about cod sperm and about not finding any little animals in blood or saliva |
April 1, 1679 |
cousin Maerten Huijchs Leeuwenhoek appointed tax master |
April 12, 1679 |
Lambert van Velthuysen wrote Letter L-079 to Leeuwenhoek about arteries and nerves |
April 25, 1679 |
Wrote Letter L-080 of 1679-04-25 to Nehemiah Grew about living little animals in fish, hare, and dogs and his calculation that more than ten times as many living animals come from the milt of a cod as there are people living on the Earth |
April 27, 1679 |
Wrote Letter L-081 of 1679-04-27 to Constantijn Huygens about the number of sperm in the milt of the cod |
May 1, 1679 |
Visited by James, Duke of York, and "several high personages" |
May 4, 1679 |
Constantijn Huygens wrote Letter L-082 to Leeuwenhoek that his son Christiaan’s new book Dioptrica is about to be published |
May 4, 1679 |
mentor Constantijn Huygens, writing to his son Christiaan, called Leeuwenhoek the "bourgeois philosopher of Delft" |
May 11, 1679 |
Wrote Letter L-083 of 1679-05-11 to Lambert van Velthuysen about people with gout |
May 15, 1679 |
Wrote Letter L-084 of 1679-05-15 to Christiaan Huygens to explain more about his observations of little animals |
May 20, 1679 |
Wrote Letter L-085 of 1679-05-20 to Constantijn Huygens about the number and size of the little animals he was observing |
June 1, 1679 |
Lambert van Velthuysen wrote Letter L-086 to Leeuwenhoek about the chalky discharges from gouty skin and his well-known controversy with the conservative supporters of the House of Orange |
June 13, 1679 |
Wrote Letter L-087 of 1679-06-13 to Nehemiah Grew asking him to acknowledge two letters from earlier that year |
June 13, 1679 |
Wrote Letter L-088 of 1679-06-13 to Lambert van Velthuysen about the origin of life and the lack of appreciation by physicians and surgeons |
June 17, 1679 |
Lambert van Velthuysen wrote Letter L-089 to Leeuwenhoek about procreation |
July 11, 1679 |
Wrote Letter L-090 of 1679-07-11 to Lambert van Velthuysen about about the chalk produced by gouty patients and about bladder stones |
July 20, 1679 |
Robert Hooke read his translation of Letter L-080 of 1679-04-25 at a weekly meeting of the Royal Society |
July 27, 1679 |
Robert Hooke showed the Royal Society microscopical observations of the liquor in a lamb's testicles |
August 1, 1679 |
Robert Hooke wrote Letter L-091 of some time in August 1679 to Leeuwenhoek; now lost |
August 10, 1679 |
Robert Hooke showed the Royal Society microscopical observations of a cock's testicles |
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 wine |
October 13, 1679 |
Wrote Letter L-092 of 1679-10-13 to Robert Hooke to inquire of Hooke why he had not received any correspondence from the Royal Society for months, also discussed bladder stones |
October 18, 1679 |
Lambert van Velthuysen wrote Letter L-093 of 1679-10-18 to Leeuwenhoek about his delay in responding and gout |
October 27, 1679 |
Robert Hooke wrote Letter L-094 of 1679-10-27 to Leeuwenhoek about examining fecund and sterile eggs for spots |
October 30, 1679 |
cousin Pieter Abrahams Hogenhouck buried |
November 1, 1679 |
Philosophical Collections number 1 published in London, including Leeuwenhoek's Letter 28 of 1679-04-25 (AB 43) to Nehemiah Grew |
November 14, 1679 |
Wrote Letter L-095 of 1679-11-14 to Lambert van Velthuysen about gout, salt, and drinking tea |
November 20, 1679 |
Wrote Letter L-096 of 1679-11-20 to Robert Hooke, copying his Letter L-095 of 14 November 1679 about gout, salt, and drinking tea |
January 12, 1680 |
Wrote Letter L-097 of 1680-01-12 to Robert Hooke about the structure of wood and sperm in fish |
January 16, 1680 |
Wrote Letter L-098 of 1680-01-16 to Robert Hooke, enclosing a copy of Letter L-085 of 1679-05-20 to Constantijn Huygens about the number and size of little animals |
January 25, 1680 |
Robert Hooke read part of Letter L-096 of 1680-01-12 about the structure of wood |
February 1, 1680 |
Robert Hooke read Letter L-085 to Huygens of 1679-05-20 about the number and size of little animals in ginger water |
February 2, 1680 |
Robert Hooke wrote Letter L-099 to inquire whether Leeuwenhoek would accept election to the Royal Society |
February 7, 1680 |
microscopist Jan Swammerdam died |
February 8, 1680 |
Elected a member by the Royal Society |
February 13, 1680 |
Wrote Letter L-100 of 1680-02-13 to Robert Hooke that being elected a member of the Royal Society would be an honour |
February 18, 1680 |
cousin Margaretha (Grietjen) Huijchs Leeuwenhoek married Gijsbert Pieterse Cruijt |
February 22, 1680 |
Thomas Gale authorized by the Royal Society to send diploma with seal to Leeuwenhoek |
February 29, 1680 |
Royal Society ordered that its coat of arms be engraved on the silver box holding Leeuwenhoek's diploma |
March 4, 1680 |
Royal Society discussed a silver box for Leeuwenhoek's diploma |
March 7, 1680 |
Royal Society further discussed Leeuwenhoek's diploma |
March 8, 1680 |
Thomas Gale wrote Letter L-101, sending Leeuwenhoek official notice of his election as member of the Royal Society |
March 21, 1680 |
Royal Society postponed reading of Letter L-085 of 1679-05-20 to Huygens |
March 28, 1680 |
Royal Society again postponed reading of Letter L-085 of 1679-05-20 to Huygens |
April 5, 1680 |
Wrote Letter L-102 of 1680-04-05 to Robert Hooke about the testicles and sperm of a rat and organisms in the gills of oysters and in the sap of vines |
April 11, 1680 |
Robert Hooke read Letter L-102 of 1680-04-05 about rat sperm and organisms in gills of oysters and sap of vines |
April 22, 1680 |
Robert Hooke wrote Letter L-103 to Leeuwenhoek as official notice of his election as member of the Royal Society |
May 13, 1680 |
Wrote Letter L-104 of 1680-05-13 to Members of the Royal Society expressing his surprise and gratitude at being elected a member |
May 13, 1680 |
Wrote Letter L-105 of 1680-05-13 to Robert Hooke to gratefully accept his election as a foreign member of the Royal Society and to acknowledge the receipt of his diploma |
May 13, 1680 |
Wrote Letter L-106 of 1680-05-13 to Thomas Gale about little animals in sap and whether little animals are in the air |
May 23, 1680 |
Robert Hooke read the three letters of 1680-05-13 thanking the Royal Society |