THE CELL DOCTRINE. 83 



years another meaning has heen given to the term, 

 an anatomical one, in which the original general ap- 

 plication has been altogether ignored, and that is 

 that part of the cell outside of the nucleus without re- 

 gard to the properties of the matter, corresponding 

 to the "cell contents " in cells which have a cell-wall. 

 Thus we speak of the protoplasm of the colorless 

 corpuscle or the liver-cell, or of the squamous epithe- 

 lial cell, whereas the properties of the substance thus 

 named are vastly difterent. In the former two in- 

 stances living growing matter is meant, in the latter 

 dead formless material, incapable of growth and re- 

 production through its own inherent properties. 

 l"hese differences should be always remembered. 



With these general considerations in the history 

 of " protoplasm," we are the better prepared to take 

 up the theory of 



DK. BEALE, 1861. 



, In April and May, 1861, Prof Lionel S. Beale de- 

 livered the lectures before the Royal College of Phy- 

 sicians of London, in which he promulgated the 

 views which have since been further elaborated and 

 become permanently associated with his name. These 

 views were published in part, in Beale's " Archives 

 of Medicine," and in September, 1861, in a volume 

 " On the Structure of the Simple Tissues of the 

 Human Body," in the preface to which he says, " he 

 thinks it right to state that the conclusions which 

 have now assumed a definite form have gradually 

 grown upon him during the course of observations 



