PLATE 5 
EXPLANATION OF FIGURES 
21 Culture 675. Endothelial cells from liver, 7-day chick embryo; 7-day 
culture. Numerous large degeneration vacuoles, mitochondrial granules, 
large centrosphere Janus green, iodine. X 480. 
22 Culture 694. Endothelial cells from liver, 7-day chick embryo; 7-day 
culture. Large vacuoles (dark in figure), pale long mitochondria. Janus 
green, neutral red, iodine. X 1450. 
23 and 24 Culture 676. Endothelial cells from liver, 6-day chick embryo; 
10-day culture; pH 6.6. Fig. 23, fragmentation of nucleus, vacuoles, mitochon- 
drial threads, rods, granules. Fig. 24, extrusion of nucleolus. Janus green, 
iodine. X 1450. 
