s'oxyder." (Ber?iard, 18P7, p525). The second and more 



recent theory is attributed to Jacques Loeb, a well known 



It 

 advocate of the theory* aftd asserts that the nucleus is 



the center of oxidations of the cell, the organ where the 

 oxidative processes are most prominent and rapid. " It 

 seems to me therefore, that all the facts which are knovm 

 thus far very naturally support the idea that the nucleus 

 is the org:cn of oxidation of living matter: and that frag- 

 ments of cells without a nucleus are not able to regenerate 

 because their oxidative activity has fallen to too low a 

 point, ouch pieces die slowly from asphyxia." (Loeb^'^oi;. 



While it may be that both of these theories fall wide 

 of the mark, it is well, in reviewing the experimental data 

 at hand, to bear in mind their relation to the two views: 

 that the nucleus is the synthetic organ or the oxidative 

 organ of the cell. 



In seeking an experimental proof of the function of 

 the cell nucleus, only one method has been extensively 

 used: that of dividing the living cell into two parts, and 

 making a comparative study of the part v/ith a nucleus and 

 the part without a nucleus, the differences being attributed 

 to the presence or absence of the nucleus. The other exper- 



(9) 



