558 U. S. BUREAU OF FISHERIES 
Galtsoff and his assistants. Doctor Galtsoff and H. R. Seiwell 
worked largely on the physiology of feeding and reproduction in 
oysters, and field observations on various problems in oyster culture 
were conducted by Dr. Henry Federighi and J. H. Weatherby. 
The laboratory was made the center of the mackerel investigations, 
also, under the direction of O. E. Sette. W.C. Schroeder conducted 
his investigations on the life history of the cod and haddock and 
completed his manuscript on the fishes of Chesapeake Bay, which 
is to be published in collaboration with Dr. S. F. Hildebrand. 
Dr. C. J. Fish and Marie P. Fish continued their investigations 
of the eggs and larve of the cod and other larval fishes occurring in 
the Woods Hole region. 
Dr. F. G. Hall, of Duke University, assisted by Dr. Samuel Lep- 
kovsky and Dr. Irving E. Gray, continued their excellent researches 
in the metabolism of fish, with reference to various degrees of 
salinity of water. 
In addition to the staff of the bureau, researches were conducted 
by numerous private investigators. Dr. N. A. Cobb, nematologist, 
of the United States Department of Agriculture, continued his 
studies, with the aid of four assistants, on the nematode fauna of 
Woods Hole region. Dr. Edwin Linton and Dr. G. A. MacCallum 
carried on their studies of fish parasites, as they have done for many 
years past. Paul S. Conger, of the Carnegie Institution of Wash- 
ington, working under the direction of Dr. Albert Mann, continued 
the study of the diatom flora, with particular attention to the bottom 
forms. Dr. C. B. Wilson carried on important studies in both 
parasitic and free-living copepods, and among other things com- 
pleted the examination of a large number of collections made by the 
Albatross and other research vessels of the bureau. 
Earle B. Perkins occupied the Harvard table while engaged on 
color changes in Crustacea. Dr. H. B. Stough, Dr. C. J. Connolly, 
Dr. W. E. Bullington, E. F. B. Fries, Dr. F. M. Baldwin, and E. 
G. Agersborg were also engaged on private researches. Dr. N. 
Borodin, of the Brooklyn Museum, visited the station in connection 
with his museum work. 
The fisheries biological laboratory at Fairport, Iowa, has already 
been mentioned in connection with the work on the commercial fresh- 
water mussels, and also in connection with the studies in aquiculture 
made by Russell F. Lord under the direction of Dr. H. 8. Davis. 
These are the major activities, but the station, under the direction of 
T. K. Chamberlain, has been the center of other important activities. 
A. H. Wiebe, a special investigator for the bureau, made a 
biological survey of the upper Mississippi during the summer, using 
Fairport as headquarters. This investigation, while under the direc- 
tion of the bureau, was financed largely by the States of Minnesota 
and Wisconsin and the municipalities of St. Paul and Minneapolis. 
The plankton collections made will be studied at the Fairport station 
by Mr. Wiebe. 
An investigation begun by Dr. R. E. Coker some years ago, when 
he was director at the Fairport station, was taken up again during 
the past summer by Doctor Coker, at the bureau’s request. This was 
a study of the effects of the dam across the Mississippi at Keokuk, 
Iowa, upon the fish population above and below the dam. 
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