XXVIII. 
pL^ru -f 
HEIGHTS IN FEET 
3000 
914 
2750 
838 - 
2500 
762 
2250 
685 - 
2000 
609 - 
1750 
533 - 
1500 
457 - 
1250 
381 • 
1000 
304 - 
DEPTHS IN FEET 
