THE EARLY BIOLOGY 



she makes glands and hair; she (as the stu- 

 dent's natural aptitude or inaptitude) can 

 prepare the way for and offer resistance to in- 

 struction; she is all-sufficient; she produces 

 natural species and legislates language; in dis- 

 ease she may withhold signs, but may be con- 

 strained by art to yield them; the means em- 

 ployed by her are likened to the means in use 

 in the arts." * 



One of the Hippocratic treatises, probably 

 dating from the close of the fifth century, 

 gives much zoological information, and even 

 suggests something like a classification of 

 animals and plants. Another, somewhat later 

 in date, discusses with great intelligence the 

 generation of animals and plants. It is a 

 worthy predecessor of Aristotle's works upon 

 these matters. 6 



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