PLATE 2 
EXPLANATION OF FIGURES 
7 Culture 681. Endothelium from liver, 8-day chick embryo; 7-day culture; 
janus green, iodine. X 146. 
8 Same culture. X 480. 
9 Culture 636. Endothelium from liver, 10-day chick embryo; 1-day cul- 
ture; janus green, neutral red, iodine. X 480. 
10 Culture 678. Endothelium from liver, 8-day chick embryo; 4-day cul- 
ture; janus green, iodine. X 480. 
11 Culture 717. Endothelium from liver, 8-day chick embryo; 6-day cul- 
ture; pH 7.4; janus green, iodine. X 480. 
12 Culture683. Endothelium and liver cells from liver, 8-day chick embryo; 
6-day culture; pH 6.4; janus green, neutral red, iodine. X 480. 
52 
