HISTORY 



9 



of teaching revolutionized anatomical methods. His 

 greatest work, however, was the opening of men's minds 

 to the opportunities for scientific progress to those who 

 would make observations for themselves and draw their 

 own conclusions. 



HARVEY (1578-1667, English), following the anatomical 

 discoveries of Vesalius, laid the foundations of our modern 

 methods of experimental investigation in biological science. 

 His great work was the demonstration of the circulation 

 of the blood, an epoch-making discovery. Before his time 

 it was supposed that there was a sort of an ebb and flow 



FIG. 6. Harvey. (From Locy, Biology 

 and Its Makers.) 



FIG 7. Linnaeus. (From Locy, 

 Biology and Its Makers.) 



in the blood-vessels, that the arteries contained blood mixed 

 with animal spirits from the lungs, and that the veins held 

 the crude blood. Harvey showed conclusively that the 

 blood traversed a regular route through the body. This 

 may seem like a simple everyday fact at the present time, 

 but in the fifteenth century Harvey's assertions, though 

 they were finally accepted, excited great controversy and 

 astonished the whole scientific world. 



LINNAEUS (1707-1778) was the founder of modern 

 systematic zoology. Before his time species were rather 



