Figure 4. 



-Movements of bottles released along the transect, Chicago to St. Joseph, 

 June 17, 1931. 



Four bottles from the central part landed on 

 the southern coast and three moved to the 

 western coast; one was taken as far as 6 miles 

 south of Port Washington, Wisconsin. Some of 

 the eastern bottles had floated more than 

 60 miles along the Michigan shore within 26 

 days. 



St. Joseph to Grand Haven to Nets 



Sixteen bottles (94 percent) were recovered 

 from the 17 released June 18 and 22, 1931 

 (table 5), along the Michigan shore (fig. 5). 



Seven (44 percent) of the 16 bottles had 

 retained the drag. The recoveries were re- 

 corded over a period of 5-93 days, an average 

 of 32.6. The minimum distances of travel 

 were 15-160 miles, an average of 80.6. 



Thirteen bottles were scattered northward 

 from 3 j miles north of South Haven to the 

 North Manitou Island — two landed to the south- 

 east down to three-quarters of a mile north 

 of Bridgman; and one floated to the western 

 shore at the Great Lakes Naval Station (Illinois). 

 The fact that eight bottles floated beyond 75 



11 



