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ments of respiration. He represents again the simplest form of a 

 plethysmograph. Unfortunately there is no authentic portrait of 

 Swammerdam, so I am informed by my old friend Professor Stokvis, of 

 Amsterdam. In Rembrandt's Legon d'Anatomie (N. Tulpius) the 

 figure of Hartmans was considered as that of Swammerdam, but that 

 is quite a mistake. On the two hundredth anniversary of his death — 

 "Sterfdag" — there was fixed on the house where he lived in 

 Amsterdam a tablet bearing the inscription — 



JAN SWAMMERDAM 



(1637-1680). 



Zijn onderzoek der natuur blijft een 



voorbeeld voor alle tijden. 



17 Feb., 1880. 



A medal was struck in his honour on the ninetieth anniversary of the 

 " Genootschap tot Bevordering van Naturgenees- en Heelkunde te 



FRONTISPIKCE PROM ONE OP THE EDITIONS OP SWAMMERDAM's TRACT " DE RESPIRATIONE," 

 SHOWING REPRODUCTIONS OP MOST OF THE FIGURES IN THE TEXT. 



Amsterdam." On this occasion Professor B. J. Stokvis gave a 

 brilliant address on the life-work of his great fellow-countryman. 



SWAMMERDAM had as a contemporary FRANCESCO REDI 

 (1626-1694), Professor of Medicine in Pisa, Physician, Poet ; 

 Naturalist, and Philosopher, whose works on insects and on the 

 poison of the viper are classics. He was the first to use the term "Omne 

 vivum ex ovo," and was one of the pioneers of the doctrine of Biogenesis. 

 I well recollect the impression made on my mind long years ago by 

 the remarks of Professor Joseph Lister in the operating theatre of the 



