34 



ESSENTIALS OF ZOOLOGY 



Antonj van Leeuwenhoek (1632-1723) lived almost contemporane- 

 ously with Malpighi and like him made many contributions to the 

 development of the microscope. He is said to have possessed a total 

 of 419 lenses, most of which he had ground. Further study on 

 capillary blood circulation, first descriptions of spermatozoa, ex- 

 tended observations on bacteria and microscopic animals, and his 

 valuable contributions to the development of the microscope are the 

 enviable accomplishments of this man. 



Fig 7 — Linnaeus (1707-1778), first great student of taxonomy. (Reprinted by per- 

 mission from Locy, Growth of Biology, Henry Holt and Company, Inc.) 



Carolus Linnaeus (1707-1778) was a very eminent Swedish biolo- 

 gist, who, like many early students of this subject, was educated 

 as a physician. He followed somewhat in the footsteps of Ray 

 (1628-1705), who had paved the way by fixing a definite conception 

 of a species and introduced the use of anatomical features in dis- 



