Robert Hooke wrote Letter L-094 of 1679-10-27 to Leeuwenhoek about examining fecund and sterile eggs for spots

October 27, 1679

This letter is known only by reference in other letters. The date is New Style, which was ten days ahead of the Old Style date of 17 October 1679 used by Hooke in London.

In this letter, Robert Hooke writes to L. that his previous letter was sent in August and that Leeuwenhoek’s recent observations please him and his colleagues. He asks Leeuwenhoek to examine fecund and sterile eggs and to look for spots on them. He promises to send current numbers of Philosophical Transactions.

Leeuwenhoek's “slight observations and considerations” are in Letter L-092 of 13 October 1679, which contains a copy of Leeuwenhoek's Letter L-090 of 11 July 1679 to Lambert van Velthuysen about gout and whether Moxa could cure it.

The letter to Van Velthuysen that Leeuwenhoek mentions in Letter L-096 of 20 November 1679 is Letter L-095 of 14 November 1679, about the tophi of gouty patients, the influence of crystals of common salt on the human body, and the beneficial effect of drinking tea.

Grew made the promise to send Philosophical Transactions nos. 139 and 140 in Letter L-075 of 13 October 1678.

Hooke’s previous letter to Leeuwenhoekuwenhoek is the lost Letter L-091 of August 1679. His next letter to Leeuwenhoek is Letter L-099 of 2 February 1680.


Letter L-096 of 20 November 1679 to Robert Hooke:

In your welcome letter of October 17th, Old Style, you tell me that you wrote to me in the month of August, but I did not receive that letter. I also saw that the last slight observations and considerations that I sent you pleased both yourself and those to whom you showed them; reason why I resolved to communicate to you the following speculations which I have also sent to Mr. Velthuysen at his earnest request.

Letter L-097 of 12 January 1680 to Robert Hooke:

You recommend me in your welcome letter of October 17th to examine fecund and sterile eggs. I have observed the spots of several eggs, but have not been able to see anything remarkable in them. ...

Also, I will look forward to receiving the Transactions mentioned by you in your last letter, and which you and Mr. Nehemiah Grew promised to send me.