PROGRESS IN BIOLOGICAL Iiq"QUIRIES, 19 2 7 245 



On the biological side, an assistant for Mr. Juday has been provided who 

 will aid in the study of the preserved samples of plankton by the microscope. 



It is hoped that a report on the organic content of the lakes may be made 

 during the current year. The determination of organic carbon and nitrogen 

 ought to be completed by Christmas, and a report on organic matter may be 

 based on these. It is impossible to predict the amount of time required to 

 perfect the apparatus for microdetermination of fats, but it is not likely that 

 this item can be determined for any great number of lakes before the end of 

 the calendar year. Whether a similar report can be prepared on the mineral 

 content of the lakes will depend on the progress made in the analyses ; and as 

 these involve some experimental work and new methods, it is not safe to pre- 

 dict the progress they will make. 



FISHERIES BIOLOGICAL LABORATORIES AND FIELD STATIONS 



During 1927 the bureau operated three of its biological labora- 

 tories throughout the entire year, and in addition field stations are 

 maintained, with varying degrees of permanence, at various places 

 in the United States. Temporary laboratory quarters have been pro- 

 vided by the College of Fisheries of the University of Washington 

 at Seattle, the University of Michigan at Ann Arbor, the Natural 

 History Museum at Stanford University, Calif., and by the city of 

 Corpus Christi, Tex. 



The laboratory at Woods Hole opened for the summer season on 

 June 20, 1927, with its facilities again completely utilized by the 

 bureau's staff and private investigators. Elmer Higgins, in charge 

 of the division of inquiry, acted as director. The work of Dr. P. S. 

 Galtsoff, Dr. Samuel Lepkovsky, Dr. E. B. Perkins, Dr. A. E. Hop- 

 kins, O. E. Sette, E. W. Bailey, R. A. Nesbit, and several temporary 

 student assistants, with oysters and mackerel, has already been dis- 

 cussed. J. C. Pearson, temporary assistant, continued his studies on 

 the life histories of Texas fishes, and Dr. F. G. Hall, of Duke Univer- 

 ity, and Richard L. Pearse, temporary assistants, continued their 

 studies on respiration in fishes. 



The customary space was occupied by Dr. N. A. Cobb, of the De- 

 partment of Agriculture, with several assistants, in continuing a 

 study of the nematode fauna of the Woods Hole region. Dr. Barnett 

 Cohen, chemist of the Hygienic Laborator}^, United States Public 

 Health Service, was engaged in oxidation-reduction studies through- 

 out the season; Paul S. Conger, of the Carnegie Institution, con- 

 tinued his diatom investigations. The university tables were occu- 

 pied as follows: Princeton, Samuel E. Hill, hemolysis of blood of 

 fishes; Harvard, Gordon E. Gates, annelids, and E. F. B. Fries, 

 xanthophors of Fundulus; Johns Hopkins, Dr. John C. Hemmeter, 

 <3omparative histology of the spleen of Lophius. Among the inde- 

 pendent investigators who occupied tables at the laboratory were Dr. 

 Edwin Linton and Dr. G. A. MacCallum, working on helminth para- 

 sites of fishes; Dr. C. B. Wilson, on copepocls of the Woods Hole 

 region; Dr. Arch E. Cole, metabolism in clams; Dr. Haldane Gee, 

 bacteriology of fish muscle ; Joseph B. Glancy and Horace B. Pease, 

 effects of chlorine on oysters; Florencio Talavera, Crustacea and 

 MoUusca of Woods Hole; George H. Kennedy, histology of muscle 

 tissue of cod. Dr. H. M. Smith, director of fisheries at Bangkok, 

 Siam, and former United States Commissioner of Fisheries, con- 

 tinued his studies on the local fish fauna throughout the summer. 



