Subjects 



Labor to produce fifty tons of trout, a lime 

 study. PFCv. 14, no. 3 A 



Laboratory, mobile. PFC v. 10, no. 1 J; 

 Sep 172 



Lactobacillus leichmannii, studies in the 

 assay of vitamin Bi2. Sep 297 



Ladders ( See Fish ladders). 



Lake Erie fishes ( See Fishes -Lake Erie). 



Lake fisheries (See Fisheries, Lake). 



Lake herring ( See Herring, Lake). 



Lake Mendota, Wisconsin, organic content of 

 water. Doc 1012 



Lake of the Ozarks (See Fisheries). 



Lake Pepin (See Mussels, fresh-water). 



Lake Titicaca ( See Fish culture). 



Lake trout: 



breeding habits in New York. FB 59 



fingerlings from eggs taken in Seneca, 



Saranac, and Raquette Lakes; compari- 

 son. PFC V. 14, no. 1 C 



home canning. CB 28; FL 180; IR 34 



life history. FL 15 



propagation, artificial. Doc 949 



smoking. FL 122 



yearlings, stocked, from Seneca and 

 Raquette Lake breeders; survival 

 and growth. PFC v. 14, no. 2 F 



Lakes: 



apparatus and methods for collection of 

 attachment materials. PFC v. 15, 

 no. 2 J 



classification of. FC 26 

 echo sounder, use on Maine lakes. 

 PFC V. 15, no. 4 C 



fertilization, artificial. SSR-F 113 

 improvement. PFC v. 12, no. 3 A 

 mapping in Wisconsin. PFC v. 15, no. 3 G 



northwestern, of the United States; 



biological and chemical studies with 

 reference to fish production. Doc 944 



sport-fishery projects. Cir21, 26 



survey of, instructions for. FC 26 



Lampreys: 



biological investigations of fishery 



resources of Trinity River, California. 

 SSR-F 12 



sea, feeding mechanism of. FB 98 



sea, in Michigan, natural history. 

 SSR-F 55 



sea, of the Atlantic Coast and Great Lakes. 

 FL 360, 384 



sea, spawning in Michigan streams of 

 Lake Superior. SSR-F 70 



sea, spawning in Wisconsin and Minnesota 

 streams of Lake Superior. SSR-F 97 



sea, spawning runs in the Great Lakes, 

 1950, 1951. SSR-F 61, 68 



sea, use of electricity in control of. 

 SSR-F 92 



Land use applied to fisheries. PFC v. 15, 

 no. 2 C 



Landings, statistics on: 



Alabama, by months, beginning with 



September 1950, discontinued January 

 1952 through March 1954 (See Title 

 List of Current Fishery Statistics- 

 CFS-series). 



Alabama, La., Miss., and Texas, 1942, 

 1943, 1944. Sep 20, 65, 95 



Alaska fisheries ( See Fisheries, Alaska; 

 Fisheries, United States and Alaska). 



Boston, 1942, 1944, 1948. Sep 21, 76, 

 243 



Chesapeake fisheries (See Fisheries, 

 Chesapeake). 



207 



