WEBSTER, JOHN R. , AND RAYMOND J. BULLER 

 1950. Drift bottle releases off New 



Jersey — A preliminary report on 

 experiments begun in 1948. U.S. 

 Fish and Wildlife Service, Spec. 

 Sci. Rep.: Fish. no. 10, 21 pp. 



WELCH, PAUL S. 



1952. Limnology. 2d. 

 xi + 538 pp. 



edit. , McGraw-Hill, 



IVHIPPLE, GEORGE CHANDLER 



1927. The microscopy of drinking water. 

 Revised by Gordon Maskew Fair and 

 Melville Conley Whipple, 4th edit., 

 John Wiley and Sons, Inc., xix + 

 586 pp. 



WRIGHT, STILLMAN 



1955. Limnological survey of western 



Lake Erie. U. S. Fish and Wild- 

 life Service, Spec. Sci. Rep.: 

 Fish. no. 139, 341 pp. 



APPENDIX 



Figures 19-27 contain the release and 

 recovery points of drift bottles floated in 

 the 1956 Saginaw Bay-Lake Huron study. 

 Meanings of numbers and symbols used are as 

 follows : 



A bottle recovered on the day it was 

 released was considered to have been adrift 

 zero days. If it was recovered the day 

 after release, the drift period was one 

 day. 



1. Triangle - release point. 



2. Dot - recovery point. 



3. Plain number - number of days 



between release and recovery. 

 Drift unit intact. 



4. Number circled - same as No. 3 



except unit without drag when 

 recovered. 



The wind track 

 station nearest the 

 bottles is included 

 wind track includes 

 days prior to releas 

 as the time interval 

 might be influencing 

 Numbers on the wind 

 indicate the end of 



from the Coast Guard 

 drift paths of the 

 on each page. The 

 the wind vectors 4-10 

 e of bottles as well 

 during which the wind 

 bottle movement. 

 track are dates and 

 a 24-hour period. 



5. Number enclosed by square or 



rectangle - same as No. 3 except 

 loss or retention of drag not 

 indicated. 



6. Number enclosed by hexagon - same 



as No. 3 except reply card only 

 was found. 



7. Question mark - number of days 



between release cind recovery not 

 known. 



30 



INT.-DUP. SEC. WASH., D.C. ueOJ2 



