The results of this investigation, as far as they concern the fishes, 



vd.ll be presented in another report. A large part of the physical, chemical, 



and biological data are incorporated in the appropriate chapters of this 

 reoort. 



Season of 1929 



In making plans for the program of 1929, it was decided to continue 

 the parallel studies of 1928, but to facilitate the work, the staff was 

 divided into two groups. One grouo included those working in fisheries 

 biology; the other, those working in limnology. At the request of the Ohio 

 Division of Conservation, the United State Bureau of Fisheries assigned the 

 writer to the task of directing the field work in limnology, under the super- 

 vision of Dr. John Van Oosten, In Charge Great Lakes Fishery Investigations. 

 The other members of the s taf f, listed below, were employed by the Ohio Divi- 

 sion of Conservation, and the costs of equipment and maintenance of the sur- 

 vey also were borne by that agency. This plan of administration was continued 

 in 1930. 



The use of two motor boats. Investigator and Veto , made possible inde- 

 pendent but parallel studies of the two phases of the problem in hand. The 

 account which follows concerns only the limnological part of the survey. 



The personnel of the staff is given below, together with an indication 

 of the institution with which each was connected at the time, and of the 

 duties or field of investigation on the survey: 



E. L. Wickliff, Chief, Bureau of Scientific Research, 



Ohio Division of Conservation. (Director 

 of the Survey) , 



Stillman Wright, United States Bureau of Fisheries. (In 

 charge of limnological investigations). 



Wilbur M. Tidd, Ohio State University. (Zooplankton) 



L. H. Tiffany, Ohio State University. (Phytoplankton) . 



William C. Beaver, Wittenberg College. (Bacteriology) 



Elbert B. Ruth, University of Wisconsin. (Bottom fauna) . 



Doris Ann Wright, University of Wisconsin (Plankton). 



C. J. Munter, Ohio State University. (Chemistry, part-time). 



Headquarters were established in the Ohio hatchery at Put-in-Bay. As 

 in the earlier years additional space and equipment were made available in 

 the Franz Theodore Stone Laboratory. The first observations were made on 

 May lU; the last on October 22. With minor exceptions the full staff was on 

 duty from June l5 to September l5, and in the remaining time the program 

 was carried on by W. M. Tidd and the writer. 



The general plan of investigation was the same in 1929 and 1930. This 

 will be discussed in later pages of the introduction, together with the loca- 



15 



