PROGRESS IN BIOLOGICAL INQUIRIES, 193 3 353 



Brke, Ruby. 



Nvimhers of bactoria in iiihind lake waters of Wisconsin as sliown by 

 the direct microscopic' met hod. Internat. Revue ges. Hydrobiol. and 

 H.vdrog. October. 

 JuD.w. C and K. Schnkhekgkk. 



Growth studies ol' pame lish in Wisconsin water.s. Second Keport, April. 

 (Mimeograph form). 

 JuuAY, C. an<l K. A. Birce. 



The transparenc.v, the color and the specific conductance of the lake 

 waters of northeastern Wisc(msin. The Wisconsin Academ.v of Scient-es, 

 Arts and Letters, vol. 28. 

 Mkloche, V. W. and T. SETrKHQUisr. 



The determinatron of calcium in lake water and in lake water residues. 

 The Wisconsin Academy of Sciences, Aits and Letters, vol. 28. 

 Titus, Leslie and V.W. Meloche. 



A microextractor. Industrial and Engineering Cliemistry. 



OYSTER INVESTIGATIONS 



During the j^-ear 1933, oyster investigations under the direction 

 of Dr. Paul S. Galtsoff were continued in Massaclmsetts, Connect- 

 icut, Nortli Carolina, Florida, Louisiana, and Washington. Inves- 

 tigation in Massachusetts and Connecticut, with headquarters 

 at Milford, Conn., consisted in experimental studies on growth and 

 fattening of 03'Sters, and in observations on seasonal changes in 

 the chemical composition of oyster meat. The United States 

 Fisheries Laboratory at Beaufort, N.C., served as headquarters 

 for oyster investigations in the South Atlantic States and 

 Louisiana, where a series of surveys of oyster producing bottoms 

 was made with the view of ascertaining their suitability for the 

 cultivation of oysters. On the Pacific coast, investigations on 

 cultivation of native oysters were carried out at Olympia, Wash. 

 The work of the Bureau was greatly facilitated by the cooperation 

 of the respective State authorities who supplied boats, labor, 

 and laboratory facilities. 



GKOWTII AND FATl^ENING OF OYSTERS 



Observations and experiments on growth and fattening of oysters 

 were carried out at Milford, Conn., and at Woods Hole. Mass., 

 by P. S. Galtsoff, E. O. Smith, and V. L. Loosanoff. The Connecti- 

 cut Shellfish Connnission continued its cooperation with the Bureau 

 in this research work, assigning the State boat /Shellfish to assist 

 in field work and jjroviding laboratory facilities at Milford. Dur- 

 ing the cold season, the State boat was in dock, but field observations 

 were continued through the courtes}^ of the Connecticut Oyster 

 Farms Co., which provided a suitable boat and assisted in collect- 

 ing sam])Ies. Laboratory work during the winter was carried out 

 at the Osborii Zoological Laboratory of Yale University. 



The research facilities at Milford have been materially increased 

 by a construction of two concrete tanks which permitted experi- 

 mental studies on artificial feeding of oysters and conditions in- 

 creasing the productivity of the sea water. As a supplement to 

 these experiments, several planktonic organisms were cultivated in 

 the laboratories at Woods Hole, Mass., and Yale University. The 

 purpose of the experiments was twofold ; first, to determine the con- 

 ditions which accelerate propagation of marine algae, thereby in- 



