SUMMARY 



1. The U. S. Bureau of Commercial Fisheries 

 conducted surface -cunent studies with drift bottles, 

 drift envelopes, and cylindrical plastic tubes as part 

 of fishery and Umnological investigations of Lake 

 Michigan in 1954 and 1955. 



2. Releases in central and southern Lake Mich- 

 igan in 1954 were: 1, 080 drift bottles, 1, 080 drift 

 envelopes, and 100 plastic tubes. Dates of release 

 were between July 9 and September 15. Returns were 

 received of 587 reply cards from drift bottles, 77 from 

 drift envelopes, and 18 from plastic tubes. The dis- 

 ttibution of these returns indicated that no stable pat- 

 tern of surface currents existed in the summer of 1954. 

 In general, the drift was west to east; movements to 

 the north or south were about equal. 



3. Releases in 1955 in central and northern Lake 

 Michigan between April 26 and November 8 totaled 

 2, 000 sand-baUasted drift bottles and 2, 000 drift bot- 

 tles with drags. Returns were received of 1. 060 reply 

 cards from sand -ballasted bottles and 1, 128 from bot- 

 tles with drags. In 1955 as in 1954 surface currents in 

 Lake Michigan exhibited no stable pattern. Drift in 

 general was west to east; drift in the eastern areas was 

 mainly to the north but that in the western area show- 

 ed no prevailing pattern. 



LITERATURE CITED 



Ayers. J. C. ,D. V. Anderson, D. C. Chandler, and 

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 1956. CurrenU and water masses of Lake Huron, 

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Ayers, John C. .David C. Chandler, George H. Lauff, 

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 1958 Currents and water masses of Lake Mich- 

 igan. Great Lakes Res. Inst. , Univ. of 

 Mich., Publ. no. 3, 169pp. 



Beeton, Alfred M. , James H. Johnson, and Stanford 

 H. Smith 

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Cooperman, A. , G. Cry, and H. Sumner 



1959. CMmatology and weather services of the 

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Crohurst, H. R. , and M. V. Veldee 



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 of Lake Michigan in the vicinity of South 

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Deason, Hilary J. 



1932. A study of surface currents in Lake Mich- 

 igan. The Fisherman, vol. 1, no. 5, 

 pp. 3-4. 12. 



Emery. K. O. 



1951. Bathymetric chart of Lake Michigan. Inst, 

 of Tech. . Engineering Exp. Sta. , Univ. 

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Forch, C. 

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Ober die Beziehungen zwischen Wind and 

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GaUe. P. H. 



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Harrington, Mark W. 



1895. Surface currents of the Great Lakes, as de- 

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 during the seasons of 1892, 1893, and 1894. 

 U. S. Dept. Agric. , Weather Bur. , Bull. 

 B (rev. edit. ). 14 pp. 



Hough. Jack L. 



1953. Pleistocene chronology of the Great Lakes 

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