CELL SIZE AND NUCLEAR SIZE 
EDWIN G. CONKLIN 
From the Department of Biology, Princeton University 
THIRTY-SEVEN FIGURES 
CONTENTS 
PART I. CELL SIZE AND NUCLEAR SIZE IN NORMAL DEVELOPMENT............ 
PaUnequalcellidinvistonen nn. .st thes) An. vo soul ndbek cee 
Thy ROUSE ST bcs Ae hd RS Aa er oe ele Yo ads 
Seenincanco.an thesyolk lobe... . 21. Jo.08% ow at onc tee Be 
IT. Cell size and nuclear size in eggs and blastomeres.................. 
1. Cell size and nuclear size in the cleavage of Crepidula plana.... 
2. Cell size and nuclear size in the cleavage of Fulgar carica....... 
LL. Cell size and nuclear size in adult tissue cells...................... 
IV: Rhennenting. causesionmcelldivasion: .<.....<.8ees4e 5, ocd. 
V. Growth of protoplasm during cleavage..........................-. 
VI. Rate of nuclear growth during cleavage........................... 
1. Nuclear growth during the cleavage of the egg of Crepidula. ... 
2. Nuclear growth during the cleavage of the egg of ul caren see 
3. Nuclear growth during the cleavage of other animals.......... 
4. Growth of different nuclear constituents..................... 
Cpe laSmnsOIneS «044.5, i: 0s 7 ee ee ie ie ae ee 
faiCen:rosonies and spheres. 2.) etn as a oe ee ee, 
5. Conclusions as to nuclear growth during cleavage............ 
6. Comparison of growth of chromatin with increase of chemical 
substances and processes during cleavage................... 
VII. Senescence, rejuvenescence, and the ratio of nucleus to plasma..... 
PART II. EXPERIMENTAL STUDY OF CELL SIZE AND NUCLEAR SIZE IN THE EGGS 
1 
THE JOURNAL OF EXPERIMENTAL ZOOLOGY, VOL. 12, no. 1 
JANUARY, 1912 
