LX I. 
HEIGHTS IN FEET 
1000 
304 8 
900 
274-3 
800 
243 8 
700 
213 4 
600 
182-9 
500 
152-4 
400 
121-9 
300 
91-4 
200 
61 
DEPTHS IN 
FEET 
FEET 
METRES 
3 05 
7-6 
15-2 
22 9 
30-5 
'* 5/ r 
“W jjs. p«fe 
x s >ZM&' ■&**&&&*: 
: &yh& ‘SMi 
* V \V- WM .. . i 
saiK *i i 
J. G B artkolomevr 
