56 55 54 53 52 51 



52 



~r 



50 49 



48 



47 46 45 44 



-52 



50 



-49 



A 



-48 



-47 



-46 



-45 



44 



43 



—'42 

 44 



56 55 54 53 52 



50 49 48 47 46 45 



Figure 12. — Ice Conditions, IS May 1967. 



23 



