28 DEATH AND RESURRECTION. 



sarily a unit of members and organs 

 whose functions, and even coarser ana- 

 tomic structure, were beyond any ac- 

 curate investigation. The elementary 

 parts of the organic tissues cannot, of 

 course, be observed in this stage. They 

 Jippear first under the microscope and 

 it is therefore with the discovery of 

 this epoch-making instrument that the 

 science of organisms enters into a new 

 era. 



Toward the end of the seventeenth 

 century, Malpighi and Grew found that 

 organic tissues, placed under the micro- 

 scope, did not consist of homogeneous 

 substance as they appear to the naked 

 eje, but of small particles separated 

 from each other, which particles have 

 been called cells. Rut although the 

 cells were discovered, their real impor- 

 tance was far from being understood, 

 or even surmised. This was no doubt 

 the reason for the small interest given 

 to the cell during the eighteenth cen- 

 tury, and the small progress cytology 

 made during this whole period. 



