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Antoni van Leeuwenhoek
Hans Sloane
Signed autograph Covering letter for EL/L3/11 Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 12, p 331
25 September 1699 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/10
1700
Signed autograph Observations of liver fluke; on the larvae of gnats; observations of a species of green algae belonging to the genus 'Volvox'; observations of circulation of blood in a frog and micro-organisms in its faeces No original figures are attached Read to the Royal Society on 22 May 1700 English translation see EL/L3/14 Transcribed in JBO/10/183 Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 13, p 3 English translation printed in 'Philosophical Transactions', vol 22, no 261, p 509
02 January 1700 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/13
Observations of a liver fluke; on the larvae of gnats; observations of a species of green algae belonging to the genus 'Volvox'; observations of circulation of blood in a frog and micro-organisms in its faeces Translated extract of EL/L3/13 English translation printed in 'Philosophical Transactions', vol 22, no 261, p 509
01 January 1700 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/14
Signed autograph Says that he has examined the sperm of many animals, but if there is any animal that the Royal Society would like him to investigate, he will do so Read to the Royal Society on 12 June 1700 English translation see EL/L3/16 Transcribed in JBO/10/187 Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 13, p 109
14 June 1700 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/15
Says that he has examined the sperm of many animals, but if there is any animal that the Royal Society would like him to investigate, he will do so Translation of EL/L3/15
01 January 1700 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/16
Signed autograph Observations of blood circulation in flounder; on red blood corpuscles of flounder and salmon, their oval form and the way they change shape to pass through capillaries; on blood vessels; observations of the sperm of a young cock No original figures attached Read to the Royal Society on 17 July 1700 English translation see EL/L3/18 Transcribed in JBO/10/192 Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 13, p 131 English translation printed in 'Philosophical Transactions', vol 22, no 263, p 552
09 July 1700 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/17
Observations of blood circulation in flounder; on red blood corpuscles of flounder and salmon, their oval form and the way they change shape to pass through capillaries; on blood vessels; observations of the sperm of a young cock Translation of EL/L3/17
01 January 1700 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/18
Observations of the larvae of cheese-flies; experiments with cheese-flies and sulphur; treatment of toothache with vitriol Read to the Royal Society on 24 July 1700 English translation see EL/L3/20 Transcribed in JBO/10/193 Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 13, p 163 English translation printed in 'Philosophical Transactions', vol 22, no 265, p 635
27 July 1700 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/19
Observations of the larvae of cheese-flies; experiments with cheese-flies and sulphur; treatment of toothache with vitriol Translated extract of EL/L3/19 Printed in 'Philosophical Transactions', vol 22, no 265, p 635
01 January 1700 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/20
Signed autograph Concerning the larvae and pupation of cheese-flies Read to the Royal Society on 13 November 1700 4 figures in pencil - believed to have been made by Henry Hunt (d 1713), keeper of the Royal Society's Library since 1696 English translation see EL/L3/22 Transcribed in JBO/10/200 Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 13, p 191 English translation printed in 'Philosophical Transactions', vol 22, no 265, p 640
07 September 1700 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/21
Concerning the larvae of cheese-flies Translation of EL/L3/21 Printed in 'Philosophical Transactions', vol 22, no 265, p 640
01 January 1700 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/22
Signed autograph Observations of black flies on fruit trees; observations of aphids; comparing the parthenogenetic procreation of aphids with spermatozoa; on the development of the pupae of moths 5 red-chalk figures attached Read to the Royal Society on 27 November 1700 English translation see EL/L3/24 Transcribed in LBO/13/18 Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 13, p 199 English translation printed in 'Philosophical Transactions', vol 22, no 266, p 659
26 October 1700 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/23
Observations of black flies on fruit trees; observations of aphids; comparing the parthenogenetic procreation of aphids with spermatozoa; on the development of the pupae of moths Translation of EL/L3/23 Printed in 'Philosophical Transactions', vol 22, no 266, p 659
01 January 1700 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/24
Signed autograph On the spermatozoa of a ram; objections to Nicolaas Hartsoeker's claim to have discovered sperm first in 1678 when Leeuwenhoek had written to the Royal Society about this in 1677. This latter letter no longer exists but a transcription and translation of observations of the discovery of living spermatozoids is printed in 'Alle de brieven van Antoni van Leeuwenhoek', vol 2, p 277 and 'Philosophical Transactions', vol 12, no 142, p 1040. 7 red-chalk figures of sperm attached Read to the Royal Society on 15 January 1701 Transcribed in JBO/10/208 English translation printed in 'Philosophical Transactions', vol 22, no 268, p 739 Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 13, p 227
25 December 1700 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/25
1701
Signed autograph Observations of a gall on a willow; concerning larvae from cheese Read to the Royal Society on 26 February 1701 8 red-chalk figures attached English translation see EL/L3/27 Transcribed in JBO/10/212 Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 13, p 245 English translation in 'Philosophical Transactions', vol 22, no 269, p 786
28 January 1701 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/26
Observations of a gall on a willow; concerning larvae from cheese Translation of EL/L3/26 Printed in 'Philosophical Transactions', vol 22, no 269, p 786
01 January 1701 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/27
Observations of spermatozoa from cod; calculation of its size; observations of spermatozoa from ram and pike Read to the Royal Society on 28 May 1701 Translated extract see EL/L3/28a Transcribed in JBO/10/219 Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 13, p 291 English translation printed in 'Philosophical Transactions', vol 22, no 270, p 821
15 April 1701 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/28
Concerns calculating the size of sperm; observations of spermatozoa from ram and pike Translation of EL/L3/28 Printed in 'Philosophical Transactions', vol 22, no 270, p 821
01 January 1701 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/28a
Concerning the quality of magnifying glasses; observations of the cornea, blood vessels, and small particles (crystalline humour) in Leeuwenhoek's eye Read to the Royal Society on 9 July 1701 English translation see EL/L3/34 Transcribed in JBO/10/224 Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 13, p 367 English translation printed in 'Philosophical Transactions', vol 22, no 273, p 903
21 June 1701 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/33
Concerning the quality of magnifying glasses; observations of the cornea, blood vessels, and small particles (crystalline humour) of Leeuwenhoek's eye Original is EL/L3/33 English translaton printed in 'Philosophical Transactions', vol 22, no 273, p 903
01 January 1701 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/34
Signed autograph Covering letter for EL/L3/38 Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 14, p 31
06 December 1701 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/37
1703
Signed autograph Gives thanks for sending issues of 'Philosophical Transactions' and a book on mines in Peru Covering letter for EL/L3/54 Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 14, p 247
03 November 1703 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L3/53
1709
Signed autograph States that he sends a letter from John Chamberlayne
10 September 1709 Sender: Antoni van Leeuwenhoek , Antoni van Leeuwenhoek Reference number: EL/L4/26
1713
