J\*otes to Introductonj Lecture. xlix 



and uses of the different parts belonging to the organs of ge- 

 neration in both sexes. Trans. Royal Soc. *JVew Mrid. voh 

 ±9 page 2il. 



De Graaf also rendered essential services to anatomy, by 

 contriving convenient instruments for injecting vessels, the 

 idea of which had however occurred before to others, and 

 had even been carried into effect. 



JS"ote±3. 



Anthony Van Leewenhoek, so highly celebi'ated for his 

 curious microscopical observations, was a Dutch gentleman, 

 of Delft in Holland. He was born in the year 1632, and 

 died in 1733, aged 91 years. Leewenhoek was not, properly 

 speaking, a man of letters, but from the extraordinary assi- 

 duity with which he pursued his researches into the minuter 

 parts of nature, and the striking novelty of the curious ob- 

 servations which he published, his name is perhaps more 

 frequently quoted by philosophers and naturalists, than that 

 of any other writer of his time. Thiy celebrated observer 

 had the good fortune to live at a period, when the instru- 

 ment by which he obtained his fame, was yet in some de- 

 gree in its infancy. He applied himself with unremitted 

 care to the grinding and polishing into a state of perfection, 

 the simple lens, as being the best calculated for accurate in- 

 vestigation ; and less liable to those deceptions which a com- 

 position of glasses sometimes occasions. So many, and so 

 extraordinary were the discoveries of Leewenhoek, that he 

 may be said to have brought into view a new world in sci- 

 ence ; and such was the general truth and fidelity of his ob- 

 servations and descriptions, and the respect paid to his com- 

 munications, that he has been not unaptly complimented 

 with the title of the Delphic Oracle, and yot he Avas not free 

 from errors. Trans. Royal Soc. Lond. JNTetc; Jihrid. vol. 2, 

 l)age 66. 



His works were printed in Latin at Leyden, in 1722, and 

 afterwards in Low Dutch ; and have been translated into 

 English by Samuel Hoole, London, 1800. 



