Documents 



*Doc 959. The ichthyophthirius disease of 



fishes, and methods of control, by Herbert 

 F, Prytherch. 1924. 6 p.. illus. Appendix 9 

 to the Report of the U. S. Commissioner of 

 Fisheries for 1923. 



*Doc 960. Oyster-cultural problems of Con- 

 necticut, by J. S. Gutsell. 1924. 10 p., illus. 

 Appendix 10 to the Report of the U. S. 

 Commissioner of Fisheries for 1923. 



*Doc 961. Experiments in the artificial propaga- 

 tion of oysters, by Herbert F, Prytherch. 

 1924, 14 p., illus. Appendix 11 to the Report 

 of the U. S. Commissioner of Fisheries 

 for 1923. 



*Doc 962, Fisheries of Key West and the clam 

 industry of southern Florida, by William 

 C. Schroeder, 1924, 74 p,. illus. Appendix 

 12 to the Report of the U. S, Commissioner 

 of Fisheries for 1923, 



*Doc 963. Food and feeding in fresh-water 



mussels, by E. P. Churchill, Jr., aind Sara 

 I. Lewis. 1924. 439-471 p., illus. From 

 Bulletin of the Bureau of Fisheries, v,39, 

 1923-24. 



*Doc 964. Propagation and distribution of food 

 fishes; fiscal year 1923, by Glen C, Leach. 

 1924, 108 p. Appendix 13 to the Report of 

 the U. S. Commissioner of Fisheries for 

 1923. 



*Doc 965. Fishes of Gulf of Maine (with biblio- 

 graphy and addenda); by Henry B. Blgelow 

 and William W. Welsh. 1925. 567 p., illus. 

 Bulletin of the Bureau of Fisheries, v. 40, 

 1924, Part 1. 



*Doc 966. Annual report of the Commissioner of 

 Fisheries to the Secretary of Commerce for 

 the fiscal year ended June 3 0, 1924. 1924. 

 40 p. 



*Doc 967. Iodine content of sea foods, by 



Donald K. Tressler and Arthur W. Wells. 

 1924. 1-12 p. Appendix 1 to the Report of 

 the U. S. Commissioner of Fisheries for 

 1924. 



*Doc 968. Plankton of the offshore waters of the 

 Gulf of Maine, by Henry B. Bigelow. 1926. 

 1-509 p., illus. From Bulletin of the Bu- 

 reau of Fisheries, v,40. 1924, Part 2, 



*Doc 969. Physical oceanography of the Gulf of 

 Maine, by Henry B. Bigelow. 1927. 511- 

 1027 p., illus. From Bulletin of the Bureau of 

 Fisheries, v. 40, 1924, Part 2. 



"Doc 970. Variation in the maximum depth at 

 which fish can live during summer in a 

 moderately deep lake with a thermocline, 

 by Frank Smith. 1924. 1-7 p. From Bul- 

 letin of the Bureau of Fisheries, v.41, 

 1925. 



*Doc 971. Progress in biological inquiries; 

 fiscal year, 1924. by Willis H. Rich. 

 1925, 13-46 p. Appendix 2 to the Report of 

 the U. S, Commissioner of Fisheries for 

 1924, 



='=Doc 972, Black tumor of the catfish, by Ray- 

 mond C. Osburn. 1925. 9-13 p. From Bul- 

 letin of the Bureau of Fisheries, v,41, 

 1925. 



*Doc 973, Alaska fishery and fur-seal indus- 

 tries in 1923, by Ward T, Bower. 1925. 

 47-140 p., illus. Appendix 3 to the Report 

 of the U, S. Com.missioner of Fisheries 

 for 1924. 



*Doc 974. Growth and degree of maturity of 



Chinook salmon in the ocean, by Willis H. 

 Rich. 1925. 15-90 p., illus. From Bulletin 

 of the Bureau of Fisheries, v,41, 1925, 



*Doc 975. Seasonal distribution of the plankton 

 of the Woods Hole region, by Charles J, 

 Fish, 1925. 91-179 p., illus. From Bulletin 

 of the Bureau of Fisheries, v,41, 1925, 



*Doc 976, Fishery Industries of the United 

 States; 1923. by Oscar E. Sette, 1925, 

 141-359 p. Appendix 4 to the Report of the 

 U, S, Commissioner of Fisheries for 1924, 



*Doc 977. Digestive enzymes in poikilothermal 

 vertebrates; an investigation of enzymes 

 in fishes, with comparative studies on 

 those of amphibians, reptiles, and mammals, 

 by Walter A, Kenyon, 1925. 181-200 p. From 

 Bulletin of the Bureau of Fisheries, v.41, 

 1925. 



*Doc 978. Propagation and distribution of food 

 fishes; fiscal year 1924, by Glen C. Leach. 

 1925. 361-440 p., iUus. Appendix 5 to the 

 Report of the U. S. Commissioner of 

 Fisheries for 1924. 



*Doc 979. Iodine content of preserved sea foods, 

 by Arthur W. Wells. 1925. 441-444 p. Ap- 

 pendix 6 to the Report of the U. S. Com- 

 missioner of Fisheries for 1924. 



*Doc 980, Goldfish; their care in snnall aquaria 

 and ponds, by E, C. Fearnow. 1925. 445- 

 458 p.. illus. Appendix 7 to the Report of 

 the U. S. Commissioner of Fisheries for 

 1924. 



*Doc 981, Artificial propagation of shad, by Glen 

 C. Leach. 1925. 459-486. p., illus. Appendix 

 8 to the Report of the U. S. Commissioner 

 of Fisheries for 1924. 



=>Doc 982. Annual report of the Commissioner of 

 Fisheries to the Secretary of Commerce for 

 the fiscal year ended June 30, 1925. 1925, 

 40 p. 



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