REPORT OF COMMISSIONER OF FISH AND FISHERIES. 118 
work was resumed July 1, 1900, it was with the intention to continue 
as many of the lines of observation as possible until July, 1901. 
The investigations were again placed under the direction of Dr. 
Bb. W. Evermann, who, during the summer months, had the following 
assistants: Dr. J. T. Seovell, teacher of biology, Terre Haute, Ind., 
High School, whose time was devoted chiefly to a study of the plants 
of the lake and its immediate shores; Mr. Leonard Young, teacher of 
biology, Evansville, Ind., High School, who was put in charge of the 
plankton investigations; Mr. Millard Knowlton, student, Indiana State 
Normal School, and Mr. H. W. Clark, of Fort Wayne, Ind., general 
assistants, and Mr. W. F. Hill, assistant engineer, U.S. Fish Comimis- 
sion, who, with Prof. R. G. Gillum, teacher of physics and chemistry, 
Indiana State Normal School, and Mr. T. B. Evermann, student, 
Cornell University, made the survey for accurately mapping the lake. 
This survey was completed early in September, and the volunteer 
assistants returned to their respective school and college duties about 
the first of September, leaving only Dr. Evermann and Mr. Clark to 
continue the investigations during the fall. When the former returned 
to Washington Mr. Clark remained at the lake and carried on the 
observations during the winter and spring. 
The results of Mr. Clark’s observations are important and interest- 
ing. They cover a period of the year during which but little study 
has been given to any American lake, and it is believed that they will 
add materially to a knowledge of the physics and cecology of small 
lakes. Perhaps the more important series of observations made 
during the winter pertained to the behavior of various species of 
fishes, mollusks, turtles, and aquatic plants, the feeding of coots and 
other water birds, the series of temperature records, and the action 
of the ice in its relation to the life in the lake and in modifying the 
shore line. In spring the observations regarding the breeding times, 
habits, and places of the different species of fishes, turtles, frogs, 
crustaceans, and mollusks, the growth of the aquatic plants of the lake, 
and the development of the plankton were of much interest and value. 
The report on these investigations is now in preparation, and when 
published will constitute a fairly complete monograph of Lake 
Maxinkuckee. 
BIOLOGICAL SURVEY OF THE GREAT LAKES. 
This work, which had been in progress for several years, was 
continued under the direction of Professor Jacob Reighard, of the 
University of Michigan. The plan of operating a central laboratory 
at Put-in Bay, which should serve as the headquarters of the survey, 
was temporarily abandoned, and a number of independent inquiries 
were taken up by field parties. 
One of the most important of the fundamental biological investi- 
gations which must be undertaken in lakes is the nature, abundance, 
F. ©. 1901——8 
