392 
LEEUWENHOEK AND HIS ‘‘ LITTLE ANIMALS ”’ 
I. DutcH EDITIONS 
Ondervindingen en Beschouwingen der onsigtbare geschapene waarheden, 
vervat in verscheydene Brieven, geschreven aan de Wijt-beroemde 
Koninklijke Societett in Engeland. 4°. Leyden, 1684 (van 
Gaesbeeck). [pp. viii + 8 + 32. Contains Letters 32 & 33, 
unnumbered and paged separately. Figs. engraved in text.] 
Ondervindingen en Beschouwingen der onsigbare geschapene waarheden, 
waar in gehandeld werd vande Evyerstok [enz. enz.]. 4°. Leyden, 
1684 (van Gaesbeeck). [pp. ii + 21 + 19. Contains Letters 37 
& 39, unnumbered and separately paged. Figs. engraved in text.] 
(a) Another edition of Letter 37 entitled: Antony van Leeuwenhoeks 
37ste Missive, Geschreven aan de Heer Cristopher Wren. 4°. [Lugd. 
Bat. 1696 ?] [No preliminary leaves: paged 1-20 (not 21, as in 
orig. ed.), and with different make-up.] 
Ondervindingen en Beschouwingen der onsigbare geschapene waarheden, 
waar in gehandelt wert vande Schobbens inde Mond [enz.]. 4°. 
Leyden, 1684 (van Gaesbeeck). [pp. iv + 24. Contains Letter 
40: unnumbered, with figs. engraved in text.] 
(a) Another edition, entitled: Antoni van Leeuwenhoeks 4Oste 
Missive, Geschreven aan de Heer Francois Aston. 4°. [Lugd. 
Bat. 1696 ?] [No preliminary leaves: pp. 1-24, identical with 
Ist ed.] 
Ondervindingen en Beschouwingen der onsigbare geschapene waarheden, 
waar in gehandeld werd over het maaksel van’t Humor Cristallinus 
[enz.]. 4°. Leyden, 1684 (van Gaesbeeck). [pp. ii + 26. 
Contains Letter 41: unnumbered, with figs. engraved in text.] 
Later edition: see No. 17. 
Oniledingen en Ontdekkingen van de onsigtbare Verborgentheden ; vervat 
in verscheyde Brieven, geschreven aan de Wyd-vermaarde Koninklijke 
Wetenschap-soekende Societeyt tot Londen in Engeland. 4°. 
Leyden, 1685 (Boutesteyn). [pp. 88, but mispaginated 79-94 
from p. 72 to end. Contains Letters 38, 42, 43; unnumbered, and 
with continuous pagination. All figs. engraved in text.] 
(a) Another edition [? 2nd] dated 1691. [non vidi.] 
(0) Another edition [? 3rd] dated 1698. Same title and publisher, 
but with letters numbered. 
Ontdekkingen en Ontledingen van Sout-figuren van verscheyden Souten : 
van Levendige Dierkens in de Mannelyke Saden de Baarmoeder 
ingestort ; ende van de Voort-telinge [enz.]. 4°. Leyden, 1685 
(Boutesteyn). [pp. 76. Contains Letters 44 & 45; unnumbered, 
and with continuous pagination. ] 
(a) Second edition, zbid. 1696: with letters numbered (but 45 mis- 
numbered 46.) 
Ontledingen en Ontdekkingen van het Begin der Planten in de Zaden 
van Boomen [enz.|. 4°. Leyden, 1685 (Boutesteyn). [pp. 78. 
Contains Letters 46 & 47: unnumbered, and with continuous 
pagination. | 
(a) Another [? 2nd] edition, ibid. 1697. Letters likewise unnumbered. 
