PLATE XLIX. 

 Effects of Electric Cueeent. 



Fig. 80. Exp. 997 (3) : 1 volt, 15 min., normal 30 min. Egg and sperm nuclei are large and contain 

 little chromatin, sphere material in granules, no segregation of yolk and cytoplasm. 



Fig. 81. Exp. 997 (3): Similar to preceding. 



Fig. 82. Exp. 1106: 5 mil. amp., 5 min., normal 17 hrs.; nuclear membrane dissolved and chromatin 

 clumped; development stopped. 



Fig. 83. Exp. 1106: Similar to preceding. 



Fig. 84. Exp. 1106: Similar to preceding. 



Fig. 85. Exp. 997 (3) : Similar to fig. 80, but with nuclear membrane gone. 



Fig. 86. Exp. 1140 (1): 2 mil. amp., 2 min., normal 5J hrs. Chromatin disappearing. 



Fig. 87. Exp. 1140 (2): 5 mil. amp., 10 min. Ordinary tetraster. 



Fig. 88. Exp. 997 (2) : 1 volt, 15 min., normal 2 J hrs. Plasma and nuclei displaced by convection 

 current, as in centrifuged eggs. 



Fig. 89. Exp. 997 (2): Similar to preceding. 



Fig. 90. Exp. 1121 (2): Chromosomes have disappeared leaving the spindle fibers a little more 

 chromatic than in normal eggs. 



Fig. 91. Exp. 997 (2): 1 volt, 15 min., normal 2 J hrs. Chromatin largely dissolved and displaced 

 toward lower pole; in right cell long strands of cytoplasm. 



Fig. 92. Exp. 1121 (2): 5 mil. amp., 10 min., normal 3J hrs. Spindle and chromosomes disappearing 

 in left cell; others normal. 



Fig. 93. Exp. 998 (2): 4 dry cells If hrs., normal 11 hrs. Evidently egg was in an advanced stage 

 (ca. 42 cells) at the time of the experiment. Although the cells are not dead, the micromeres are rounded 

 (f ramboisia) and many have dropped off. 



