Figure 5. --Movements of bottles released between St. Joseph and Grand Haven. June 18, 

 and between Grand Haven and nets, June 22, 1931. 



miles along the Michigan shore within 30 days 

 gives evidence of a strong northerly current. 



Ludington to Nets and Manistee to 

 Two Rivers 



Four bottles were released off Ludington 

 on June 23, 1931, and 27 were dropped on June 

 24 (table 6) along the Manistee to Two Rivers 

 transect (fig. 6). Twenty-five bottles (81 per- 

 cent) were recovered — 24 during a period of 



10-57 days and 1 in 298 days. The average was 

 27.3 days for 24 bottles and 38.1 days for 25; 

 16 of them were landed within 30 days. All of 

 the bottles had drifted northeast from about 

 1 mile north of Walther League Camp near 

 Arcadia to Cross Village (Weikamp Creek), 

 except the last one (no. 75) that was found in 

 Wisconsin off Centerville, 14 miles north of 

 Sheboygan. The minimum distances of move- 

 ment ranged from 18-136 miles and averaged 

 79.8 miles. Although the bottles moved 



13 



