DEFINITION OF THE CELL 189 



Purkinje, 1 Cohen 2 and Max Schultze. 3 The last-named in 

 1 86 1 proposed a definition of the cell which might be 

 accepted at the present day. " A cell," he wrote, "is a little 

 blob of protoplasm containing a nucleus " (p. 1 1). 



1 1839 or 1840. 



2 Nova Ada Acad. Lcop., xxii., 1850. Trans, in 1853 for Ray 

 Society. 



3 Arch. f. Anat. u. PhysioL, pp. 1-27, 1861. 



