PLATE 1 
EXPLANATION OF FIGURES 
Cells from the superior cervical sympathetic ganglion of the albino rat. Fig- 
ures 1 to 7 magnified in plate by 2000. 
1 An advanced cell and several young cells; male, one day old. 
2 An advanced cell with Nissl bodies evenly distributed; male, five days old. 
3 A cell with Nissl bodies accumulated at the periphery, common between 
twenty days and sixty days; female, twenty days. 
4 A cell with Nissl bodies accumulated around the nucleus, common between 
twenty days and sixty days and also found at later ages; male, sixty days old. 
5 A cell with larger Nissl bodies more or less evenly distributed common 
after one hundred days; female, 124 days old. 
6 A binuclear cell; female, one day old. 
7 A binuclear cell; male, one year old. 
