LIST OF PLATES 
I.—Antony van Leeuwenhoek : from the mezzotint portrait by 
J. Verkolje (1686). , ; Frontispiece 
II.—_Leeuwenhoek’s birthplace . : : ; facing page 20 
IIJ.—Registration of Leeuwenhoek’s baptism . : : ota 
1V.—Oude Delft : . : ; . 25 
V.—Leeuwenhoek’s bill to P. Heeeieecer (1659) é ' . 80 
VI.—The Town Hall of Delft . j : : F 4 3S) oe 
VII.—Vermeer’s View of Delft . : 2 : : ; . | do 
VIII.—Portrait of Henry Oldenburg, Sec. R. S. . : : > oS 
IX.—Portrait of Dr Reinier de Graaf ‘ 40 
X.—Last lines of Leeuwenhoek’s Letter 2 (MS. 15 mae 1673) 49, 
XI.—Portrait of Leeuwenhoek: from Verkolje’s oil-painting . 49 
XII.—Miniature portrait of Leeuwenhoek by J. Goeree (1707) . 76 
XIII.—Last lines of Maria’s letter to the Royal Society : , 99 
XIV.—The Old Church at Delft . ; : : 5 a Oe 
X V.—Leeuwenhoek’s tomb in the Old Oia ‘ : : ec 
XV1I.—Portrait of H. Poot by T. van der Wilt . J 5 HO? 
XVII.—Facsimile of a passage from MS. of Letter 6. : 110 
XVIII.—First page of Oldenburg’s printed translation of Letter 18. 113 
XIX.—Facsimile of first page of MS. of Letter 18 ; : eG 
XX.—A House in Delft, after J. Vermeer . : : . 125 
XXI.—The Shore at Scheveningen, after J. v. Ruisdael . : s) £29 
XXII.—Illustration to Leeuwenhoek’s Letter 32 . , ; PtSi 
X XIIJI.—Leeuwenhoek’s pictures of Protozoa in Frogs . ; 233 
XXIV.—Leeuwenhoek’s pictures of Bacteria in the Human Macen 239 
XXV.—A page of the MS. of Letter 39 . : : 240 
XXVI.—Leeuwenhoek’s figures illustrating his account ee rane 
(Letter 122)  . 259 
XXVII.—The figures of Dances ind Aes (Lewes 125 é 144) 263 
XXVIII.—The Animalcules on Duckweed . ; F 277 
XXIX.— Last page of Letter about Duckweed (MS. 25 Thee 1702) . 285 
XXX.—The figures of Anthophysa vegetans (MS. 5 Feb. 1703) . 289 
XX XI.—Leeuwenhoek’s “ microscope’”’ . : F ; J . S28 
XX XIT.—Leeuwenhoek’s seals. : : E : . . 7 SoG 
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