FIGURES 

 Number Page 



1. Transects of the M/V Cisco of the U. S. Bureau of Commercial Fisheries, Fish and 



Wildlife Service, along which drift units were released 2 



2. Types of drift units used in the 1954 and 1955 surface -current studies of Lake Michigan . 4 



3. Wind diagrams based on observations from the Milwaukee, Wisconsin, Chicago, Illinois, 



and South Bend, Indiana, U. S. Weather Bureau Stations, 1954 11 



4. Release stations, numbers recovered, and directions of recovery points of drift units 



that were released in 1954 on the South Haven -Waukegan transect 12 



5. Release stations, numbers recovered, and directions of recovery points of drift bottles 



that were released in 1954 on the Grand Haven -Milwaukee transect 13 



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



lopes that were released in 1954 on the Grand Haven -Milwaukee transect It 



7. Release stations, numbers recovered, and directions of recovery points of drift bottles 



that were released in 1954 on the Ludington-Manitowoc transect 15 



8. Wind diagrams based on observations from the Green Bay, Wisconsin, Sault Ste. Marie, 



Michigan, and East Lansing, Michigan, U. S, Weather Bureau Stations May 1955- 



January 1956 18 



9. Release stations, numbers recovered, and directions of recovery points of drift bottles 



with drags released in 1955 on the Grand Haven -Manitowoc -Sturgeon Bay transects . . 19 



10. Release stations, numbers recovered, and directions of recovery points of sand -ballasted 



bottles released in 1955 on the Grand Haven-Manitowoc-Sturgeon Bay transects .... 20 



11. Release stations, numbers recovered, and directions of recovery points of drift bottles 



with drag^ released in 1955 on the Ludingtcm -Manitowoc transect 22 



12. Release stations, numbers recovered, and directions of recovery points of sand -ballasted 



bottles released in 1955 on the Ludington-Manitowoc transect 23 



13. Release stations, numbers recovered, and directions of recovery points of drift bottles 



with drags released in 1955 on the Frankfort -Sturgeon Bay transect 25 



14. Release stations, numbers recovered, and directions of recovery points of sand -ballasted 



bottles released in 1955 oa the Frankfort -Sturgeon Bay transect 26 



15. Release stations, numbers recovered, and directions of recovery points of drift bottles 



with drag; released June 5 and July 14, 1955, on the Charlevoix -Manistique transect . 29 



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