5 ■ 
10. 
15 
20 
25 
30 
35 
40 
45 - 
50 - 
55 - 
60 - 
65 - 
70 
75 
60 
85 - 
90 - 
95 - 
■ 100 - 
105 - 
110 - 
1 15 
120 - 
125 
130 
135 
140 - 
145 - 
150 
Depth of Ice -Centimetres 
MR J. M. WORDIE ON THE NATURAL HISTORY OF PACK-ICE 
