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390 LEEUWENHOEK AND HIS “LITTLE ANIMALS” 
Vol. VIII; 1899) or by Vandevelde and van Seters (1925). 
Also partially printed or abstracted by Snelleman (1874), 
Haaxman (1871, 1875), Vandevelde (1924a). [Some of the 
MSS. known to Haaxman (1875) have seemingly since 
disappeared. They were apparently removed by a former 
librarian, who claimed them as his private property.}| A 
complete list of these MSS., with 5 others (one published) 
which I have not been able to trace further, is given by 
Harting (1876, pp. 121-3). 
The Leeuwenhoek Manuscripts in the National Library at 
Florence. These letters (about 15) were all addressed to 
Magliabechi,, and have been partly printed by Targioni- 
Tozzetti (1745) and Carbone (1930). [The latter erroneously 
includes among them a letter written by Leibniz,’ and 
previously published as such by Targioni-Tozzetti (1746). ] 
Four [? three] Leeuwenhoek Manuscripts in the Municipal 
Museum at The Hague. They are discussed, and their contents 
described, by Servaas van Rooijen (1905). 
Manuscript of a Letter (dated 3 [?13] March 1716) to 
Leibniz. Preserved among the Leibniz MSS. at Hanover 
(fide Khrenberg, 1845), together with drafts of 3 letters from 
Leibniz to Leeuwenhoek. [This letter—Send-brief XX—was 
published in full in L.’s Dutch and Latin collected works. | 
PUBLICATIONS 
No serious attempt has yet been made by any bibliographer 
to collect and collate all Leeuwenhoek’s numerous printed 
letters. His published writings have been, indeed, the despair 
of all authors who have had occasion to refer to them; and I’ 
do not, therefore, pretend to describe or enumerate all their 
many versions here. 
Leeuwenhoek himself published in his lifetime 165 letters 
(not counting letters contained within letters): and to these 
1 Antonio Magliabechi (1633-1714), a Florentine scholar of prodigious 
learning. This remarkable man—of poor parentage—became librarian to 
Duke Cosmo III of Tuscany: and though he published nothing during his 
lifetime he is said to have been himself “ a walking library ” (including the 
dust and cobwebs, apparently). L. wrote to him because he had heard that 
he was then the most learned man in Italy: and he also dedicated to him 
his Latin edition entitled Arcana Naturae Detecta (1695). 
2 Cf. p. 46, note 1, and p. 359 supra. 
