Figure 19.- -Movements of 

 bottles released from 

 Sheboygan to Sturgeon 

 Bay, June 24, 1932. 



Figure 20.- -Movements of 

 bottles released from 

 Charlevoix to Guiken's 

 Reef. August 9, and from 

 Gull Island to Manis- 

 tique, August 20, 1932. 



46 



