THE REVIVAL OF SCIENCE 133 



bridge, and afterwards took his Doctor's De- 

 gree at Leiden. He published numerous 

 treatises dealing with the anatomy of vege- 

 tables, and with the comparative anatomy of 

 trunks, roots, etc., illustrated with admirable 

 and somewhat diagrammatic plates. Although 

 essentially an anatomist he made certain 

 investigations into plant physiology and sug- 

 gested many more. Perhaps his most inter- 

 esting contribution to the science, however, 

 was his discovery that flowering plants, like 

 animals, have male and female sexes. It 

 seems odd to reflect that this discovery is only 

 about two hundred and fifty years old. When 

 Grew began to work the study of botany was 

 in a very neglected condition the old herbal 

 had ceased to interest, and with its contempo- 

 rary the bestiary, was disappearing from cur- 

 rent use, and the work of some of Grew's 

 contemporaries notably Robert Morison and 

 John Ray, hastened their disappearance. Of 

 these two systematists Ray was, on the whole, 

 more successful: Morison's efforts at classify- 

 ing the vegetable kingdom received much 

 criticism at the time and by no means came up 



