398 
NOTES BEARING ON. LEEUWENHOEK, REDI, LIN¬ 
NAEUS, DE GEER, RUDOLPHI, MULLER, LEIDY, OWEN, 
JENNER, KIRCHER AND BOYLE, WHOSE PORTRAITS 
HAVE APPEARED IN PARASITOLOGY , Vol. XIII. 
(Portrait-plates I—XI.) 
By GEORGE H. F. NUTTALL, F.R.S. 
(From the Quick Laboratory , University of Cambridge.) 
As stated in a slip inserted opposite the first portrait-plate of this series, the 
collection herein presented is issued without regard to chronological order, 
moreover, the portraits are confined to those men of science who, in various 
ways, have advanced the subject of parasitology. 
The notes that follow are intentionally written in a brief form, their object 
being to point out the main contributions to parasitology made by those whose 
portraits are included in the series whilst giving references to sources whence 
further information may be gathered by those requiring it. 
The collection of portraits that I have formed in the course of years and 
placed upon the walls of my laboratory, has frequently aroused the interest 
of my colleagues. Latterly the collection has been augmented, and it seems 
desirable to publish some of the portraits it contains, thereby rendering them 
available to a wider circle. 
Antony van Leeuwenhoek 
1632-1723. 
(Portrait-plate I, facing p. 1.) 
Leeuwenhoek was born in 1632 and died, aged 91 years, on 26 August 1723 1 
at Delft, Holland, where he lies buried in the Oude Kerk. He spent his early 
years as a linen draper, but when 22 years old obtained a sinecure office in his 
native town whereby he secured ample leisure for the pursuit of his scientific 
tastes. He learnt the art of lens grinding and is stated to have constructed 
some 250 microscopes, many of the instruments being specially adapted for 
particular investigations. With these instruments he examined everything 
that aroused his interest. In 1673 R. de Graaf sent Leeuwenhoek’s first com¬ 
munication to the Royal Society, and subsequently Leeuwenhoek addressed 
many letters to the Society some of which appeared in the Proceedings , whilst 
1 On Plate I read 1723 for 1725. 
