u ^ ^ 



' \^ 



JULY 9 



^ \ 



JULY 29 



AUGUST 19 



SEPTEMBER 

 9-11 



10 



NUMBER OF DRIFT 

 ENVELOPES RECOVERED 



Figure 6. - -Release stations, numbers recovered, and directions of recovery points of 



drift envelopes that were released in 1954 on the Grand Haven -Milwaukee tran- 

 sect. For the transect in September envelopes were released at the two eastern- 

 most stations on September 9 and the remaining stations on September 11. 



14 



