FISH POISONS 



DAVIDSON, Ralph Ho Field and laboratory studies of Derris as an 

 insecticide o PhDj Ohio, 1935 » 



SMITH, Charles L, The causes underlying the rapid loss of toxic- 

 ity of pyrethrum and derris insecticides after application and methods 

 of retarding this decomposition » PhD, Rutgers, 1937 o 



TISCHLER5 Nathanielo Studies on how Derris kills insects. PhD, 

 Rutgers, 1935 



FOOD AND FOOD ORGANISMS 



(See also CRUSTACEA ,' Hasler| LIFE HISTORY STUDIES , Britt; LIMNOLOGY , 

 Gaufin, Jahoda) 



BOBB, Marvin Lo A contribution toward a knowledge of the aquatic 

 and semi-aquatic Hemiptera of Virginiao PhD, Virginia, 1950, 



CLEVELAND, Maurice Mo Nutritive studies on white fish meals. 

 PhD, Massachusetts, 193Uo 



CUMING3, Harry Wo, Jr, A histological study of the effects of 

 vitamin E deficiency on the guppy, Lebistes reticulatus „ PhD, Illinois, 

 19i|lo 



DONALDSON, Lauren R„ Experimental studies in the nutrition of 

 the Chinook salmon with special reference to histological changes in 

 the pancreas. PhD, Washington, 1939, 



DUNHAM, Donald Westo Studies on the ecology and physiology of 

 the fresh-water jellyfish, Craspedacusta sowerbii o PhD, Ohio, 19U1. 



EVANS, Gertrude, The relation between \d.tamins and the growth 

 and survival of goldfishes in homotypically conditioned water. PhD, 

 Chicago, 19360 



FROHNE, William Co Limnological relations of insects to certain 

 emergent aquatic plants o PhD, Michigan, 1937 » 



HARDEN, Philip Ho The stoneflies (Plecoptera) of Minnesota. 

 PhD, Minnesota, 1950. 



HUNT, Burton Po A study of the life history, ecology and eco- 

 nomic importance of a burrowing mayfly, Hexagenia limbata (Serville), 

 in certain Michigan waters, PhD, Michigan, 1950. 



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