INDEX 



S39 



Protein, fish, 173-175 

 Purse seine, use of, 169 



R 



Russian sardines, preparation 

 of, 210-211 



s 



Salmon, canning, 202-207 



fisheries, Alaskan, 160-161 



life history of, 204-206 



oil, manufacture of, 217 



Pacific, species of, 203-204 



salting, 192 

 Salt, ancient importance of, 44 



bittern, use of, 57-58 



by-products, 57-58 



grainer, 56 



manufacture of, 31-32, 45-58 

 in California, 52-58 

 in Europe, 49-51 

 in Orient, 46-49 



mines, 45 



purity of, 46-47, 55 



refining of, 55-57 



rock formation of, 46 



uses of, 44-47, 55-56 



vacuum pan, 56-57 



wells, 45^6 

 Salts, in sea, 10-14, 21 

 Sardine, canning, 207-209 



California industry, 208- 



209 

 Maine industry, 207-208 

 oil, manufacture of, 217 

 Scallop industry, 248-251 

 Scallops, fishery for, 250-251 



marketing of, 251 



species of, 249 

 Scaphanders, use in pearl fish- 

 ery, 101-102 



use in sponge fishing, 330 

 Sea, area of, 5-6 



color of, 16 



currents, 8-9, 18-21 



depth of, 6-7 



life, 21-25, 35, 128-152 



light in, 16-17 



mussels, culture of, 254-255 



utilization of, 254-255 

 nature of, 3-25 

 pressure in, 14-16, 24-25 

 salinity of, 10-14, 52 

 temperature of, 8-10 

 tides, 18-19 

 volume of, 7-8 

 waves, 19 



water, composition of, 10-14 

 gases in, 13-14 

 Seal oils, properties of, 320 

 Seaweed glue, manufacture of, 

 72-73 

 uses of, 73 

 sauce, preparation of, 78 

 cultivation of, in Japan, 83 

 nutritive value of, 79-80 

 use as food, 77-«9 

 in Hawaii, 86 

 in Japan, 83-89 

 in manufacture of paper, 

 74-75 

 Seines, use of, 168-169 

 Shark leather, utilization of, 228 

 capture of, 227 

 liver oil, uses, 220-221 

 skin, tanning of, 226-228 

 Shell-fish, nutritive value of, 



171-181 

 Shell-fisheries, importance of, 37- 



39, 230-231 

 Shrimp, canning of, 275 

 drying of, 276-277 

 fishery for, 273-277 

 marketing of, 274-277 

 Size, seaweed, 72-74 

 Skate-liver oil, manufacture, 221 

 Smoke-houses, construction of, 



196 

 Sodium alginate, uses of, 71-72 

 Sperm oil, manufacture of, 304 

 Sponge fishing, history of, 325- 

 327 

 methods, 328-331 

 harpooning, 330-331 

 nude diving, 329-330 

 Sponges, bleaching of, 332 

 classification of, 332-334 

 nature of, 327-328 



