For although it be a more new and diffi- 

 cult way, to find out the nature of things, by 

 the things themfelves ; then by reading of 

 Books, to take our knowledge upon truft 

 from the opinions of Philofophers : yet muft 

 it needs be confeffed, that the former is 

 much more open, and leffe fraudulent, efpe- 

 cially in the Secrets relating to Natural 

 Philofophy. 



WILLIAM HARVEY, 

 Anatomical Exercitations, 1653. 



xiv 



