Series 



INVESTIGATIONAL, REPORTS 



*LR 1. The menhaden industry, by Roger W. 

 Harrison. 1931. 113 p., illus. 



*IR 2. Studies on the nutritive value of fish 



meals, by Esther Peterson Daniel and E. 

 V. McCollum. 1931. 19 p. , illus. 



*IR 3. Vitamin D in menhaden fish oils, by 

 John Ruel Manning, E. M. Nelson and 

 Chester D. ToUe, 1931. 5 p. , illus. 



*IR 4. Commercial production of menhaden fish 

 oil for animal feeding, by Roger W. Harri- 

 son and S. R. Pottinger. 1931. lip. 



*IR 5. Spectrographic analysis of marine pro- 

 ducts, by John M. Newell and E. V. Mc- 

 Collum. 1931. 9 p. 



*IR 6. Survey of oyster bottoms in Texas, by 

 Pauls. Galtsoff. 1931. 30 p., illus. 



*IR 7. Market for marine animal oils in the 

 United States, by Roger W. Harrison. 

 1931. 78 p., illus. 



*IR 8. Studies in crab canning, by Kokichi 

 Oshima. 1931. 8 p. 



*IR 9. Reducing the shrinkage of frozen fish in 

 cold storage, by James M. Lemon. 1932. 

 12 p. 



*IR 10. Winter trawl fishery off the Virginia 

 and North Carolina coasts, by John C. 

 Pearson. 1932. 31 p., illus. 



*IR 11. Controlling vegetation in fish ponds 

 with sodium arsenite, by Eugene W. 

 Surber. 1932. 39 p. , Illus. 



*1R 12. Chemical and physical properties of 



burbotliver oil and its vitamin content, by 

 E. M. Nelson, Chester D. ToUe, and 

 George S. Jamieson. 1932. 6 p. , illuS; 



*IR 13. The fisheries of Puerto Rico, by 



Norman D. Jarvis. 1932. 41 p. , iUus. 



*IR 14. Fisheries of the Virgin Islands of the 

 United States, by R. H. Fiedler and N. D. 

 Jarvis. 1932. 32 p. , illus. 



*IR 15. New methods of opening oysters and 

 improving their condition for market, by 

 V. Koehring and H. F. Prytherch. 1932. 

 25 p. , illus. 



*IR 16. Developments in refrigeration of fish 

 in the United States (with bibliography), 

 by James M. Lemon. 1932. 32 p., illus. 



*IR 17. Studies on the nutritive value of 



oysters, by E. J. Coulson. 1933. 30 p., 

 illus. 



*IR 18. The iodine content of oysters, by E. J, 

 Coulson. 1934. 10 p. 



*IR 19. Statistics of the mackerel fishery off the 

 east coast of North America, 1804 to 1930, 

 by Oscar E. Sette and A. W. H. Needier. 

 1934. 48 p., illus. 



*IR 20. Studies on the smoking of haddock, 

 Francis P. Griffiths and J. M Lemon. 

 1934. 12 p. 



by 



*IR 21. Shrimp industry of the South Atlantic 

 and Gulf states with notes on other 

 domestic and foreign areas, by Fred F. 

 Johnson and Milton J. Lindner. 1934. 

 83 p. , illus. 



*IR 22. Care and diseases of trout, by H. S. 

 Davis. 1934. 69 p., illus. Revised by 

 m 35. 



*1R 23. Studies on the metabolism of copper, by 

 E. J. Coulson, Roe E. Remington and 

 Kenneth M. Lynch. 1934. 12 p. 



*IR 24. Modifications in gear to curtail the 

 destruction of undersized fish in otter 

 trawUng, by William C. Harrington. 1935. 

 48 p. , illus. 



*rR 25. The iodine content of some American 

 fishery products, by E. J. Coulson. 1935. 

 7 p. 



*IR 26. Fishery for red snappers and 



groupers in the Gulf of Mexico, by Norman 

 D. Jarvis. 1935. 29 p. , illus. 



*IR 27. Chemical and physical properties of 

 haddock-liver oil and its vitamin content, 

 by S. R. Pottinger, Charles F. Lee, 

 Chester D. ToUe and Roger W. Harri- 

 son. 1935. 16 p., illus. 



*IR 28. Studies on the utilization of swordfish 

 livers, by Roger W. Harrison, S. R. 

 Pottinger, Charles F. Lee and Andrew W. 

 Anderson. 1935. 10 p., illus. 



64 



